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Seadoo 787 idle adjustment

Seadoo 787 idle adjustment. I want to be able to have the same stock fuel mixture when I turn the high-speed screw; 1½ turns out. You seem to be having the same issue I had starting my newly completed resto last year hard to start and had to feather the throttle and it wouldn't idle. Jul 26, 2021 · Aug 13, 2021. New plugs, 2 trips out look very dark. It bogs when you open the throttle, sometimes dies, sometimes (if you go slowly) it will work itself up to the higher RPM. #4. Mar 30, 2019 · Mar 31, 2019. Do the same adjustment for the throttle screw on the right side of the carb. The carbon seal is not cooled when running on the hose, and can Sep 22, 2012 · this worked for me by the book for base idle adjustments, and it was very very close to 1500 in water idle. After I finally got fuel to the carbs she started up and had a very high rev to it. I've got a '97 SPX and at the end of last summer, it started surging at WOT. If it is running rich with stock carbs I would do a rebuild, and look for a leaking needle and seat. Once I found out about the single cylinder at idle I got over it and all the other ones I have been on did the same thing. Turn oil pump cable adjustment nut to align refer-ence marks on pump. Hope it helps. Works best if i start it with throttle already 30%, and keep it there. Member. Apr 12, 2012 · 1996 GSX 787 270500284 270500285 BN-40I (SB) MAIN-142. If is for rec riding then too much of a monster 787 would not like pump gas anymore. This is the adjustment you make for up to 1/4 throttle where its hesitating and to help the transition to main jet. Karl. You are now back to the stock factory settings. Mark the location of the red plastic adjustment. The shop manual states the low speed at 1 3/4 out and High speed at 0. MANUAL. S. Seadoo specs large high speed jets in the 787; the setting for the high-speed adjustment screw is set to 0. Be aware that even on the hose, you shouldn’t run the ski out of the water for more than a couple of minutes. Aug 31, 2011 · It's not a big deal to play with the adjustments. The engine doesn't have to be running to adjust the oil pump. "M" is on the top half of the arm, and they can move differently as it is spring loaded in the middle. Ski runs well, new plugs, cleaned up the raves which were gunked to hell. Adjustment nut 3. I cant seem to find any manual for my particular model Jun 12, 2018 · It's under the gas tank, riveted to the hull, same type plate like in the rear. It doesn't go to 0. An initial run, it tacks up to 7k, then slows, is a symptom of water regulator failure. 11-27-2012, 09:42 AM. Leave the cap on it. I immediately shut her down and tried her again. It tends to foul spark plugs frequently which I believe is a result of this. Turn the screw 3 turns counterclockwise (loosen). Aug 23, 2009 · Aug 23, 2009. One of the motors stalls when I increase the throttle. When a specific model is discussed, refer to the information regarding the GTX May 27, 2016 · May 28, 2016. #2. If a particular system is not covered in this manual, refer to the Sea-Doo Shop Manual. do you think my problem is fuel delivery at idle or is it my plugs? I am using ngk br8es11 Jun 28, 2010 · Jun 29, 2010. about 1400-1600 depending on your preference. #5. $104. You can reach around the carbs to adjust the LS adjusters using your hand instead of your eyes. Jun 30, 2009 · Re: Oil injection pump adjustment 2000 Sea Doo Service manual page 07-03-5 is a good opicture of the alignment of the 787 RFI oil pump, As this oil pump is very similiar to the 947 oil pumps, it gives you a very good idea of where to look for alignment marks on the oil pump and oil pump drum. It was the same, maybe 1-200 rpm lower. Look closely and you’ll see the marks on the cable disk and the pump. Jan 23, 2017 · It has the following issues: 1. The bottom marking is then used to go 147*, counterclockwise, the top marking 65* clockwise. Ski, runs on water just fine, long as you keep it over 2k. Unless someone has moved the adjustment screws you really don't need an adjustment. The initial (mechanical) idle & sync is set with the throttle body out of the ski & using a multimeter. Jul 26, 2018 · Jul 26, 2018. Idles fine, bogs and dies when you try to accelerate. Jun 9, 2008 · Here is the procedure to replacing your cable. When you start, it tries to keep the idle at 1800 RPM. Some black wet oily liquid coming out of the exhaust. these need to be adjusted to line up. If it's leaking, it will run rich, and make restarts very hard. . I am having problems with my 04 gti le rfi idling at 900-1100 then fouling a plug and going dead. However, runs great at higher speeds without hesitation. Then in the water it'l drop to about 1500. Set idle for 1500 in water, tune ls for smoothest idle. On Mikuni and Keihin PWC carbs the high speed adjustment screw is the one closest to the flame arrestor and the low speed screw is the one closest to where the carb attaches to the manifold. Then place the pump hose on the fuel inlet and cap off the fuel return fitting and pulse fitting on carb. Aligned marks Loosen jam nut and turn cable adjustment nut to obtain proper pump setting. Low speed at 1 out and high speed at 1 1/2 out. Mar 13, 2012. On the trailer is should idle at about 2500 RPM's. Keep it in a safe spot so that you can refer to it when a question arises about your personal watercraft or SWITCH pontoon’s operation, and record both hull identification number and engine Jun 12, 2012 · I have a 1997 seadoo gtx, 787. By setting the pop off to the correct number. I reached down and turned the idle screw until it did. Now back it out one and one half turns. Got 142. The low speed adjuster has a pin through it and should be adjusted to "1 1/2" turns out for the basic adjustment. If 657 engine, dry idle to 2800. I have a 96 Seadoo XP 787 rotary engine. In water roughly 1400, on trailer roughly 3000. If not installed properly, your ski will suffer poor performance. 219704459. There is a lot of areas that are obvious like where your intake area is. If it is for competition then the porting automatically moves you to a more competitive class. The correct oil ratio is 40:1 The low speed screw should start off at about "2 1/2" turns, and the high speed screw should be at "0". They were designed to change the size of the exhaust ports in order to widen the engine’s power band. The actual R. You can dial it in from there once you start the engine. The combustion chamber might be oil slicked so you don't get a complete burn but also try richening up low speed 1/4 turn. May 28, 2008 · The idle speed is NOT adjusted with the low speed screw. When you apply some throttle, the low voltage Jun 24, 2013 · Jun 24, 2013. First you need to adjust the carburetor idle so the speed adjust touches the adjustment plate. I set the low speed on the carbs to one turn out and That is the high speed adjustment screw. turn the idle speed screw (T) out until the throttle plates are closed or there is a gap between the end of screw and carb tang/lever. R. Aug 25, 2010 · Throttle levers at helm are all the way down but boat revs high and I noticed that the throttle screw is not making contact with throttle adjustment (lever) at mag side of carb. (The RPM's will hang, and all the sudden, they will jump) The idea is to make the transition as smooth as possible. The 2 hoses going to the center of the engine will fill on their. Mar 25, 2007 · Re: idle adjustment on a 97 sea doo GTI You probably should figure out why it's doing that before turning screws. make sure the idle is correct first. Just seems to stick at the mid range. Runs fine below 4800 and wide open. on my 99 rfi, there was an Allan idle set screw just above the bell crank. It should be around 1500rpm in the water. Around 1100-1200 RPMs and the low-voltage indicator starts blinking. The high speed adjuster has a plastic cap on it to allow it to be turned only 1/4 turn. popoff 23-32 psi ( most likely to get in that range instead of the 38 it should be) High speed mag closed, PTO cracked open a bit. There is nothing you can self adjust. Jun 16, 2009. Motor fires right up and will idle but a little rough. 5 main. But if you look at other reference charts like seadoo source carb reference chart is states. 5 NS, 142. Using RAVE valves ensured better low-end power and a higher top speed. Just rebuilt a carbed 787, running a 96xp water box and stock everything else on my 97SPX. I am not sure on your but I have a 99 gsx rfi and it is 1400 +/- 50 in water idle. Mar 23, 2020 · Moderator. bad gasket somewhere (air leak) 2. The throttle linkage is set according to the manual. Both carbs should be adjusted the same to be in sync. Mar 21, 2018 · Mar 21, 2018. I am rebuilding my carbs and when I went to scrw back in my idle stop adjustment screw I noticed the hole it goes in has no threads. when starting up sometimes it takes few tries to start the seadoo so I was told it's the starter assembly need to be changed, which I'm looking for one now, but the problem is when it starts it runs great on high speed yet it keeps Feb 4, 2016 · This instructional video shows you how to install and time your rotary valve on your Sea-Doo. Sep 26, 2014. 4. If they open too soon you will have a "Bog" in the middle. Jun 14, 2012 · Jun 14, 2012. It should be used in conjunction with the appropriate VEHICLE SHOP. Hopefully you are running XPS 2 oil. Aug 20, 2012 · The LS adjustment for a 99 Challenger is 1. Apr 19, 2019 · Adjusting idle hasn't helped? 3000 rpms out the water or on the trailer. Jun 18, 2019 · Jun 19, 2019. make sure that your fuel lines are no longer the grey ones. Black 80g spring. When replacing the screw, make sure you have the little fiber washer on it, and DO NOT over tighten it. Mohannad57 said: I have a 1996 GTX 787, with multiple problems, but This is for an idle issue. Feb 12, 2020 · About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright Apr 16, 2003 · Bad gas can certainly do it, and you do need to rule that out before going further. Turn the cable adjustment screw to align the marks on the Injector pump. It will idle on the trailer at about 2200-2400 RPM's but once dropped in to the water it will drop to about 900 RPM's and surge up and down to about 1100 RPM's. Jun 12, 2009 · Jun 15, 2009. I just brought my Seadoo back home with me to work on it and have since cleaned the carb filters (both were so clogged you couldn't see through them), replaced all factory fuel lines, and cleaned out the fuel selector switch. Out of water it will probably around 3K but most importantly is the idle speed in the water. After you hit reset you turn the screw about 3 times. Please help I'm not sure what the problem is. Ok well i want to make sure what the actual settings should be at to start on a 97 GTI 717. Apr 16, 2009 · Apr 16, 2009. Now turn in the idle speed screw (T) until it just comes in contact and touches the carb tang/lever. So the low speed was adjust out to 3 turns on each carb. The carb adjustments were set to 1 turn out for the low speed adjustment and 0 for the high speed adjustment. Once in the higher RPM, it runs like a champ, strong and fast all the way up to like 6900RPM. May 24, 2020 · Three little holes (2 tiny, one small) all flow good in both carbs. 5 turns on LSA and 0 on HSA. 5 OEM MIKUNI Coated VITON Needle Valve Assemblies. The information and component/system descrip-tions contained in this manual are correct at time of writing. The old spring would make it rich being shorter. S. Ski won't idle on land or sea. Valve Adjustment. I've never rebuilt a carb in my life and the closest I've even ever come to it was spraying carb cleaner in the throttle body of an old truck years ago before buying my first diesel and never looking back. I thought something was wrong on the first one I ever rode because it ran perfectly but idled rough. They are at the end of the arrow in the picture. 70 pilot. The DI is unique in the way it controls idle. It will only hit about 6400 RPM. Original poster's 94 GTS comes with two different engines, both idle at 1400 in water. I understand that I will have to lower the size of the high Jul 20, 2010 · 07-20-2010, 11:25 AM. Yes you can adjust "F" to set it. The low speed adjustment is to help you get a smooth idle at a particular RPM. Now it is safe to fire it and it should idle about 2500 rpm out of the water and 1500 in the water but you might have to adjust the idle screw. The injector pump injects oil at at variable rate, while premix uses more oil and could foul plugs from low speed use. There is an idle adjustment T handle right on the top of the carb. It wasn't much if an adjustment. It goes to around 4. because it injects both air & fuel The machine should be able to keep its idle at 1450 whether its on the water, or on the trailer. I have a high idle speed of 2800 PRM and cannot get it lower. screw with paint dots for reference purposes. 9mL out of each port while spinning the shaft for 5 minutes and holding the pump lever FULL "throttle", I measured 6. Idle is 5k-5. Nov 27, 2012 · Tweet. I've noticed that a change of about 1-2mm in spring length can change pop by 10 psi! Aug 10, 2008 · New Member. same thing the 4 strokes do with IAC modules. Aug 10, 2015 · I have a 1997 GTX that is relatively new to me. A. The adjustment is now complete. Aug 20, 2020 · I wouldn't adjust it in the driveway. 2-4. 7-6. Turn the screw 2 more turns. What? So I looked at the parts blow up and I see nothing that indicates what the idle stop adjuster screws into. May 22, 2019 · I start the low needles can start at 1 out from closed but after fine tuning I usually end up at about 1 1/4 out. So I took my oil pump out of my 787 RFI to test it out. I would suggest you rebuild the carbs with all new Genuine Mikuni parts if you haven't already and a new fuel selector. Than take to water to adjust to in water idle setting. 1. Idle speed is not adjustable at all. Yep, no need to have such a high idle as 2700RPM in water, adjust then both while at it. Removed the air box again so i could adjust the cable. Aug 26, 2014 · flow regulator valve should be considered in the. Idle is usually around 1800 out of the water on an RFI I believe. 5 turns out and the manual also states that a range of 1/4 turn either way is normal and that both carbs. Smokes heavily (garage is immediately filled with smoke!) upon start up. I've tried adjusting the jets on the bottom of the carbs, but still no luck. mikidymac said: Idle out of the water should be 1,400 rpm and in the water 3,000 rpm. type adjustment cap on it. When I move throttle lever at carb manually engines idle at 1800 rpm in 68. Mar 24, 2020. If it is in fact at 2300 in the water you are low. You should hear the IAC valve cycle. It ran ok, but I figured I would repair the top end while I was Jun 20, 2018 · 6) Remove the bleed screw from the oil pump, and let the oil flow to the pump, and feed the pump hose. Originally posted by jersey785. I got about 5hrs into the break-in and I found compression was only 125/140. Oct 3, 2009 · 10-03-2009, 06:43 PM. Nov 14, 2010 · I have a seadoo challenger 1800 with the two 787 motor. 7 after you back out screw than you hit reset. But it's there, found it when stripping my 97' GTX doing the RESTO. Read the answers to you questions below, When adjusting the low speed setting, I start with the pto carb, then move to the mag carb. These SPXs didn't have reverse, so a faster idle, while smoother, can be tough to deal with around docks. you will have a hesitation. The high and low screws on Mikuni carbs are located on opposite sides of the carb body and the high and low screws Aug 17, 2016 · Aug 17, 2016. It was idling at 1000-1100 so I turned the Apr 19, 2009 · Pretty much all the seadoo boats have the same standard settings. I know you know this, but you typed it backwards. Jun 3, 2019 · double checked the manual and sure enough I should have the arrestor and air box in place. Yep. Way worse than carb issue. 5k on the trailer (should be at 3k rpms) 3. The WR & raves must work together to get the 787's full potential. What I found when inspecting the rave valves was that the red adjuster was screwed all the way in. Sep 5, 2010 · Sep 5, 2010. griz400 said: here is a couple of pics to align it. Then adjust the pump. Attempted to adjust the idle up a hair, no effect. tps should Jun 13, 2015 · I think I lost a nut or I am a lost nut. It's small, and you could break it. Ordered a carb kit for the new to me 1997 Challenger with a single 787 rotax. It should start and idle within 2-3 start attempts. Jul 26, 2013 · R. Hey all, I just did a complete top end rebuild on my 97 gtx 787. Viton is the best needle you can use and resists the alcohol in todays fuels and these most current Coated ones resist fuel additives that can cause needles to Jun 30, 2013 · Jun 30, 2013. if they open late. 3mL which is within the spec. 5 PILOT-70 1. Sep 26, 2014 · Well-Known Member. Fully tighten screw (clockwise) in valve cap. Nice pics. Low needles are turned out 1 and highs out 1/4 but only on the PTO as Includes One (1) OEM Fuel Pump Rebuild Kit which includes diaphragms, o-ring, gasket, check valves and grommets. I first built the motor with the same 82. the 99 gsx rfi i had if memory serves me right, i set the idle out of water at about 23-2400 rpm which idled 1600 in water. Its seems to be running great 155 PSI compression on both cylinders. So i re installed all of that and then check the idle. To check the pop‐off pressure, you will need a pop‐off pressure gauge capable of registering up to 100 P. Hey guys. The RFI skis can have a rough idle because they only idle on one sparkplug. Common ignition problems are having to replace the rectifier/regulator to get it to run good at higher rpm, even though the rectifier/regulator is not a part of the ignition, per se, but if bad it Jul 9, 2015 · Jul 8, 2015. Im having a problem with it fouling plugs at idle. Sep 16, 2014 · SOURCE: need setting for carb. Also premix at 50:1 in addition to the oil injection for the first full tank of fuel. Jul 7, 2014 · I've tried everything but new jets. I have done the following: Put in new gas and Stabil. 25mm cylinder jugs (re-honed) and new pistons, rings, pins, bearings, & crank. V. Jun 13, 2005 · 99 GTX-RFI 787 Idle Adjustment. Once the pto is adjusted what do I do Mar 12, 2012 · Hey guys, this past weekend I put a newly rebuilt engine in my '96 XP. #6. The motor idles fine and will all day long, but stalls out when I go to accelerate. She starts right up but revs too high. I have a 96 787 that I rebuilt top and bottom. (P / N 219 100 031) to obtain the required addi-tional information. 5 seat. Rave issue or carb rebuild time? By Sea-Doo Team. #8. Stock Carb Settings. Aligned marks 787 RFI Engines F07G02B 1 1. Sep 12, 2011 · The function of the throttle position sensor, aka TPS, is to supply information to the computer about the position of the engine's throttle plate. What excatly would this hurt. Aug 31, 2015 · With new engine, three things can basically go wrong: 1. It has a plastic cap that only allows for a 1/4 turn adjustment if needed. Feb 1, 2013 · You can easily go backwards when porting. The service manual calls for 5. 06-13-2005, 11:36 AM. Seems I need to adjust throttle cable to put pressure on throttle screw to gain some adjustment. Jam nut 2. Adjust idle back to 1500 or smoothest idle around that. Aug 7, 2021 · Re: ‘97 GTX 787 - low/high speed mixture preset? Thanks, guys. 5 turns on the jam nuts of the cable to get it down to 3000rpm. I. Oiling pump synchronized to factory spec. No, no need to set the timing as long as you set the marks on the stator correctly and no need to adjust the carbs. 787 RFI. My ski seems to run good but it seems to be missing a few RPM at the top. Any time you Jul 12, 2013 · The position changes when you adjust the idle, so you have to make any adjustments to the idle before aligning the pump. Well-Known Member. May 29, 2015 · Before you start it look at the front of the oil pump and you will see a small line on the pump body and one on the arm when looking head on to it. If I can get it past 25% throttle, it will take off and run great all day, as long as I don't let it go back below 25% throttle. Nov 17, 2020 · Nov 17, 2020. Both are having the same idle issue…. Does anyone know if the 787 RFI has an idle adjustment and where it is located? I am having an intermittent problem where after starting, it seems like the idle is set too low. Put it in the water, and do it there. Even after running it at higher speeds for 15-20 minutes has a rough idle and will die after about 30 seconds. carb rejet as follows- stock mains, 75 pilots, 80gram springs, 2. troubleshooting of the problem. I have a 1997 GTX with the 787. I was curious to see what happens at idle, and aligned the marks on the pump same was as This ENGINE SHOP MANUAL covers the 717 and 787 RFI Rotax made engines. Be sure the marks line up on the pump and the carburetor and the oil injector cables are in sync when you're all done. Jul 13, 2014 · Jul 14, 2014. Jun 23, 2013. Sep 20, 2007 · Sep 20, 2007. You need to adjust the carburetor idle so the speed adjust touches the adjustment plate. carb issue (it will make your engine hesitating and running bad) 3. Don't mess with it, unless you have a timing light, and follow the book procedures. Nice to finally post on here. NOTE: A mirror may be used to facilitate this ver-ification. It’s the load on the pump that lowers the idle, and the hose only runs water through the cooling system. If I back off the idle screw, the linkage will Aug 16, 2016 · The IAC valve runs to fully closed position, then opens up a standard amount a little over what should be the right spot for idle. 5 270500267 23 - 43 LOW- 1 HIGH- 0 - Air leaks anywhere into the motor case will cause a lean condition. 717 Engines F01D4RE 2 3 1 TYPICAL 1. #1. Jul 12, 2016 · Jul 12, 2016. You may have a previous stolen ski, when a person tries to register a stolen ski, it's been flagged, so someone finds a vin plate Mar 13, 2012 · New Member. Aug 16, 2016 · The IAC valve runs to fully closed position, then opens up a standard amount a little over what should be the right spot for idle. For a good starting point on the mechanical idle adjustment unscrew the idle adjuster until you don't see the throttle linkage moving anymore then screw it back in 3/4 to 1 turn. I visually inspected the engine and do not see anything out of the ordinary. Do not adjust the T handles that go into and on the sides of the carb if it's running well. I'm looking for some help on how to adjust the idle on my 1999 seadoo GTX. On the water it should idle at 1500 RPM's. Odd. This Sea-Doo Shop Manual Supplement contains information specifically applicable to the GSX (5620) and GTX (5640) watercraft models. After hooking it up to the garden hose it likes to idle around 4,000 rpm. 0 needle and seats. To properly tune carbs you must first get the idle speed corrected so that the motor idles at the right rpm, or very close to it. Jun 16, 2008 · While adjusting the idle screw check the injector cables and injector pump also. 2. Re: 787 GSX carb settings. at home, studbring mag piston to TDC, then mark ur casing, from center of gear, drawing a line, pass the top of mag hole, to the edge, then the same, but bottom of hole, to outer edge. The throttle position sensors contain electro-mechanical moving parts which are prone to wear and tear, deterioration, which eventually add to the cost of engine diagnosis. 25 to 1. Those are high and low speed. If 587 ci engine, it will be 2500 out of water. should be adjusted the same. You need to nearly drain the tank and move it out the way to see it. If I back off throttle and quickly pin it again, ski will jump to 6700. 5 from lightly seated is usually close, 1/8 turn can make a difference, twist them and see if idle is affected if not there's sumting Jun 14, 2013 · Jun 14, 2013. #3. Jun 9, 2014 · By adjusting my main adjuster are you referring to the low or high speed adjustment? I fully agree to adjusting the lows by feel based of plug temp and response I got it to a point where the response is good off idle through 1/4 throttle but when I felt the pto plug it was a little too hot for comfort even after backing the low speed out 2. It is hard to start and smokes quite a bit at idle. On the hose, you should see about 3000rpm. Problem I'm having seems to be common. Jun 28, 2017 · Jun 28, 2017. Jun 1, 2011 · 11-22-2011, 10:12 AM. I've tuned it to spec, 70 pilot, 142. My seadoo engine idles around 1400RPM I think, b/c out of water that's about 3200RPM or so. 5 mains, 1. New spark plugs. Normal top out for this ski is @6700. If you want to just bump it up, and are okay with the speed it goes, adjusting the throttle stop Aug 26, 2013 · 98 Sea Doo Challenger 1800 - High Idle speed issue - posted in 14/1800/2000/X Challenger: I have a 1998 Sea Doo Challenger 1800 with dual 787 motors. I'm forced to go out of my cove at idle for about 5 minutes because of a no wake zone. 50 turns out from closed is the LS adjustment, then reset the idle speed adjuster for 1500 rpm in the water, 3000 rpm on the trailer. = Rotax Adjustable Variable Exhaust) valves were the special exhaust power valves on their 2-stroke Rotax engines. Test your regulator/rectifier. I have a 1998 speedster with twin 787's. So lets just pretend I adjusted the idle stop screw on the throttle body of a 787 to bring my idle speed up from 1200 to 1500 in the water. May 11, 2015 · May 12, 2015. I Jul 26, 2012 · I purchase a Reman 787 engine from SBT last August and have not been able to get it running properly since. This manual covers the main differences of these new models. The extra oil MIGHT be causing it. (Pop off pressure checked in rebuild) 3. The low speed screw might need a little adjustment depending on how it runs. Hey gang. after it is running adjust it to a proper idle speed if needed. [ April 16, 2003, 09:48 AM: Message edited by: Technical Support ] Aug 10, 2013 · Aug 14, 2013. #7. Not open for further replies. Était Was 293800050 Loctite 577, 250 ml. Turn the adjusting screw all the way in until it LIGHTLY seats. First off, what ski is this? Second, you shouldn't have to take off the airbox or anything to adjust idle. Once proper idle rpm has been set previously, turn the low speed adjuster in and out in small increments until a smooth idle is obtained. Is this norma out of the water? What should the idle rpm's be? As a rule of thumb, the idle should be adjusted to around 1100 rpm (in water). This weekend the starboard engine started running a little rough and then began backfiring in the middle of the rpm range (but runs fine at the upper rpm range). (Won't pull as hard to the top) AND. Man everythings messed up on this forum right now. I was told improperly adjusted rave valves will cause issues either at low end or wide open. Re: 97 challenger (787) carb settings. E. Pop off at 33. And on the mag carb the high speed was closed and on the other carb the high speed was at 1 turn. at wot it runs great ,60 mph w/me and i weigh 225. valves are contained within the 2 black caps you have atop your 2 cylinders. That manual is a valuable resource. I like a high (er) idle myself but too high is unsafe in many ways. If its bad, thats about all the RPMs you'll get. My buddy picked up a 74 hr. Shop online for OEM Carburetor (787) parts that fit your 1997 Sea-Doo GTX, 5642, search all our OEM Parts or call at 866-829-6884. Re: Seadoo 787 wont idle or rev out over 5500. Jul 4, 2017 · 1. I know there is a ton of advice out there on this topic, but I feel that I've heeded it all. 4800 RPM and stay there on full throttle. (Set idle speed 1500 rpm in water, 3000 rpm out of water approximately) 2. You can only make it richer you can’t make it leaner. Most have found that screwing this all the way in, creates the best performance. Put your ear down close to the throttle body, put the key on the post, then remove the key. Ski will accelerate up to appx. timing (rotary valve) will make your engine running like hell (mine was too lean all the time). Idle jumps all over the place. You should be fine with 87 octane gas. It is resting on the idle speed set screw. I'm going to back out each screw 1 turn then fire up the engine (service manual says 1 turn, boards say 1 1/4). Aug 3, 2004 · 08-03-2004, 05:14 PM. There is a water regulator with a R. Jun 23, 2013 · New Member. <--thats what you taught me. You usually never have to adjust the High speed screw adjustment, from the "0" setting. 5 main and 70 pilot jets, 33psi pop off with 1. The low speed screw is the idle mixture screw, adjust for an idle that doesn't load or make for hard rich 10 minute restarts yet leaves enough fuel in the crankcase for off-idle acceleration. Includes Two (2) NEW 1. It is totally stock except for a K@N looking filter in place the stock airbox ( came installed when i bought the Seadoo). There is a lock nut. make sure you fuel selector is clean, replace it or bypass it. Low speed 1 Turn + - 1/8 turn. This Operator’s Guide Supplement contains information specifically applicable to the GTX RFI (5666/5843) model. adjuster on bottom of carb. Jul 23, 2017 · Jul 23, 2017. Our first run was not right. Sounds like something has happened to the fuel system so it may need going through. not sure all of what years had this adjustment as the later years had no adjustment which i believe is 2004 and up. Every Sea-Doo model comes from the dealer with a printed owner’s manual, or Operator’s Guide. First, wet the needle & seat assembly with WD‐40 or gas. I set the idle to 1500, then we put it in the river for better tuning. May 29, 2007 · 1999 Seadoo GTX Limited Idle adjustment. 99. Aug 18, 2011 · Re: Sea doo will run and start perfect on trailer but not on water! According to the Seadoo manualsLeedanger, your 98 GTX is 1500 in water, 3000 out of water. The Low Speed Adjuster is used in conjunction with the idle stop adjuster to maintain proper idle speed and smoothness. This supplement must be used in conjunction with the 1998 Sea-Doo Operator’s Guide (P/N 219 000 076), which contains all the general information. This was done after all slack was adjusted out throttle cable and set my oil pump marks at idle. Turn the cable adjustment screw to align the marks on Bill O’Neal’s Procedure added info in parentheses. it will start up but i have to stay on the throttle to get to open water. Sea-Doo’s RAVE (or R. It didn't take much adjustment, maybe 1. do you think my problem is fuel delivery at idle or is it my plugs? I am using ngk br8es11 . It idles at about 800 RPM's and seems on the edge of stalling. 5 turns. yr qd ff wd nf nj lp xg ev pi