Sea doo wont run full throttle. We tried everything while the ski was on the trailer and in the water. Occasionally it would run wide open but mostly just goes to half throttle and no faster. You turn the ignition but only hear clicking sounds. Was out riding 4 weeks ago at 55mph open throttle at 7000rpms running nice and smooth then I made a sharp turn and the engine died took it to a shop and they changed plugs and pulled and cleaned the carbs thay told me I am hoping this forum can help me with a Spark issue. Now it starts, but will only idle. Took a look at the driveshaft and the boot does not snug up against carbon seal and won’t stay flush. Oct 12, 2022 · Hi all I got a problem with my ski only going about 1/4 throttle. Do we need to replace the throttle cables? Can they be adjusted? How can we tell? Are can anyone think of anyone else it Hey guys, I hope you can help me out. Has always run great, always maintained since new and then this problem out of nowhere. Will go up to 6mph and turn up to 6500rpms and then it revs Not sure if it is carb related, or carbon seal/boot. Ok I have an odd problem with my new 717 motor, it wont run any faster after 1/2 throttle. Some other time I could do a run at full throttle with no power loss (all runs pretty short like maybe 20-30 seconds tops as I was just trying to figure out what was going on after the first power loss) If everything looks good on external inspection. . When I run it at wide open throttle, it alternates between pulling my arms off and then hesitating for a second as if it's fuel starved then it picks up again, pulls hard and the process repeats itself. It looks like the linkage is pulling to full throttle. Turn it off then back on and it will rev up to full rpm for a few seconds then drops down to ~4000 rpm and the engine shakes. Could that cause the GSX to not So, since the intake is inside the jet ski, the crack allowed the inside of the Sea Doo Spark to get filled with exhaust and the intake would suck in the exhaust. I individually pulled plug wires off and each one caused the power to drop off so I believe all 6 cylinders are getting good fuel and spark. Saltwater can cause corrosion. Then it will rev over 6K until you let off. I just purchased 2 SeaDoo GTX 155s and am experiencing an issue with one of them. I can't accelerate past 5mph. Outboard Not Running at Full Power | Boat Slow at Full Throttle | Boat Won’t Accelerate | Boats. 2K subscribers Subscribed 1997 Seadoo GTI carburetor rebuilt, died when idling, now won't start 1997SeadooGTI Aug 11, 2025 2-Stroke Sea-Doo PWC Forum Replies 1 Views 282 Aug 12, 2025 We recently bought a 99 speedster with the twin rotax engines. On the way back to the boat launch I tried to give We have compiled a mega Sea-doo fault code list from 2003-2021. Completed a minor restoration and replaced a lot to new. Maybe only go 1/4 throttle. I would Hi all, new to this forum and looking for some help while on vacation. You’ve got enough gas in the tank, so what gives? If your Sea-Doo won’t start, there are a variety of potential things that Hello group. Hi everyone! this is my first post. Cleaning And Lubrication Rinse your Seadoo with fresh water after each use. It will start up and rev up good not in the water but soon as you put it in the water it doesn’t wanna get up and go. She started and sounds good. First of all this forum has been a huge help. Top speed of 35 MPH and low RPM's It would only go up to 5,000 rpm at full throttle had to limp it back 6 miles to the ramp at 10 to 15 mph. it gets to about 20 mph and sounds like the rpms are only about 1/2 throttle. You might grab the drive shaft and see if you can rotate it back and forth a bit without the engine moving. Please help. Here's why I'm thinking it is lean - If I go from idle to partial throttle, then back, then 100%, it seems a bit better. net Boat Parts 58. I know it limits itself during the break-in period. My compressor is only 125 & 115 which I know it should be around 150. From a dead-stop holding the throttle fully engaged (the whole time) in "sport mode" it will take off strong, then after 2 seconds (around 9-11mph) it will bog down then take off fast as I got super busy last summer and I didn’t get a chance to take my boat out. Examine the battery for corrosion. The grey lines have been replaced Troubleshooting Sea-Doo Start-Up Issues Riding season has begun, and you uncover your Sea-Doo from storage to get it ready for the summer. then bringing it back in it would not reach 10 mph. The wear ring looks fine. I pushed off and shortly after that it started kicking out if I went over half throttle. Jun 4, 2020 · Won’t run at full throttle without some choke and at 1/4 - 1/2 throttle it’ll pull back after 15 seconds of running or so. Has a new carb kit in it, everything looked real clean before the kit and now I'm Jul 29, 2020 · 2001 seadoo gtx rfi having trouble with not running right and stumbling at half throttle and won’t run at full throttle. My wife and I just got a new 2019 GTI SE 155. Any help would be appreciated! Mar 7, 2018 · I have a 2006 Seadoo GTX 4 tec it was running great until I got in shallow water. Possible causes could relate to electrical issues like problems with the spark plugs, fuses, battery, wires and connections. My wife's 95 GTX is bogging when she gives it throttle. Occasionally there will be a burst for less than a seccond where it sounds like the rpms shoot up then fall back to about 1/2 I took it out, and it ran well for the first hour, but then it started bogging down. I'm not sure what else there is to do. Nothing is obstructing the impeller or the driveshaft. Took the ski out the other night for the first time, and the throttle won't transition past 1/3rd throttle in the water. Fix your own Jet-ski and save with these simple solutions. Anyway I have a 1995 Bombardier GTX it idles (in and out of water), revs (in and out of water), but when you hold it at 3/4 to full throttle it cuts out 3) Then, after releasing the throttle and coasting at idle for another 10 seconds or so, I hit the throttle and power is thereas it should be, only to be lost after another 2-3 seconds at full throttle. Finally, I needed to be towed back in. Anything more on the throttle doesn't help it go faster. If your jet ski won’t start, move forward or accelerate, check this guide to determine what needs to be looked into. I dont recall what the tach was doing although Im thinking it would bounce around initially. Engine cranks and cranks and in water test. I am absolutely a newbie to personal watercrafts but am mechanically inclined. Hi all not sure if there is a thread on this already but have 2000 sportster 1800 jetboat - running fine idle great but a couple of times out on the water when giving it full throttle it seems to not put out gets to a certain rev then stays there like at half throttle even when stick is full 96 GTX won’t run at full rpm. He had no idea why and just lived with it. Sounds like a strong engine, but the only problems is that it dies if I dont give Went out yesterday and when you give it full throttle it just Rev's all the way to 8500 and won't go over 10 MPH. Had to tow it back in to dock. If your jet ski won't accelerate, starts vibrating, or begins to overheat - you likely have some seaweed or debris stuck in your intake! In this short video Hello all, came across an issue on my switch the other day and was wondering if anyone else have had similar issues. I needed new gauges so I got the local seadoo dealership to put them on and sink them. If I shut the fuel off while it does this, the motor doesn't ever "clean out" or lean out and pick up, it just eventual loses all power (out of fuel). Check the coolant levels and top up if needed. Asphyxiating by pulling choke and opening throttle may stop engine run-away. I suspected a fuel restriction problem I did find that while idling if I pull the choke full open for a half second and release while simultaneously advancing the throttle I can overcome the bogging and the engine revs up to speed but then Issue Number 1 takes over and it cuts out around 5500 rpm. Pulling spark wires may injure you and not kill engine as its getting fire from burning piston carbon or red hot spark plug. The engine revs to 8000rpm, but it doesn't want to take off. What should I be checking and tweaking to get it flying at full speed ? I look forward to your ideas ! Not open for further replies. Runs Sea-Doo spark revs up at full throttle. If you release the throttle and then go right to full throttle they then get full power and run fine for the entire ride. After restarting the engine, if I open and close the throttle rapidly it will start to accelerate and then it snuffs out again. It wont go above 4-5K rpms until you hit a wave and get the impeller out of the water. If I give it a slight Acceleration, it immediately dies. I put the boat back in the water and had 35psi of fuel pressure even at full throttle. I replaced fuel lines, cleaned selector,cleaned filter, rebuilt carb (including needle), drained fuel, filled tank, new plugs. It will only go about quarter throttle and feel like its missing. Hi everyone, just bought my first boat, a 95 speedster. So i put it back in the water couple days later and same problem. My left engine wont go over 3000 rpms and it bogs down when I open full throttle sometime shuts off, so I pulled the choke little bit and gut the boat to plain with both engines, but only used right engine after plain. I just bought a 97 seadoo without taking it out on the water. Now he's saying the engine won't turn and I need a short block. It has lots of power at WOT but seems to struggle to get the gas to get there. When I push the throttles past 1/3 or 1/2 throttle, the engines peak out at 4000RPM and. The other one won't go full speed for the first 10 minutes. He said the Thanks for the add, have a 94 seadoo xp 657, it sat for 2 seasons, how do I get bad fuel out of cylinders, I tried putting fresh fuel in turning it over to flush it out, is that the only way or Need help,Helping a friend. Since the oil change, the oil has been drained to the proper amount required Trying to bring this ski back from the dead. If I hold at 10% throttle, it doesn't run great either. I've consistently been able to get past the issue by running it at full throttle until it gets past the problem. Stored since last fall. Cleaned the fuel filter, no change. I've been fighting this problem since last summer. Notice vibrations when throttling up and I have a 92 sp 580. The manual says break in period is 10 hours, a lot of people on the forums say 5 hours. you probably won't find out until you pull the pump and drive shaft. I checked nothing was in the intake by the impeller? Any thoughts???? I finally finished replacing or rebuilding both engines in my '99 Challenger 1800. Was cruising at around 25mph when my boat suddenly lost power and shut off. It will idle fine and run to about 2500 rpm and that is about as good as it gets. Started great, drove 8 hours to our family cabin in the sierras, dropped it in the water, started just fine but couldn't get the throttle to move AT ALL After getting the engine to start it was having issues idling and running full throttle which from all that I read indicated that the Carbs needed to be cleaning and rebuilt. After a few seconds it seems to catch up and runs great at more wide open throttle. on way back to shore. Why is my jet ski not accelerating? Discover the most common jet ski acceleration problems and their solutions! I wasn't sure what he thought the starter had to do with it stopping when it was in full throttle but i figured he was the mechanic. This causes the engine to NOT get enough oxygen and basically starve the Sea Doo Spark of air and cause the engine to not perform. Its at this point when I run open for awhile (20 n- 30 seconds) it backs down to 40 mph with the throttle wide open. After 13 hours of use now we are only getting 45 mph out of it. But both engines won't rev up. My 96 GTX has a weird problem. Bought a agm Deka and it cranked New to this site but long time seadoo owner. We are What are the eight most common problems with Sea-Doos? Find out from this detailed post! 96 seadoo XP 800 first time out this summer and full throttle won't go past 5 mph and pretty smoky from exhaust. Any help in troubleshooting Table of Contents Why is My Sea-Doo Not Starting? There could be many reasons why your Sea-Doo won’t start. Have changed both fuel filters and hasn’t changed. I have a 1996 GSX. Checked the impeller and underneath the sea-doo, inside the gate. Edit: fixed, plugs replaced 2008 gtx 155. Has sat for 50-60 days and noticed battery was weak. Hello Everyone! I am a new seadoo owner from Baltimore, MD. When I apply throttle , it gets up to 3000 rpm then the rest of the stroke of the throttle up to full power produces no further rev. Problem is the 96 GTS with 587. We took it out today and we have no throttle on the port engine and not much on the starboard engine either. I took it out for the first time yesterday and I seem to run OK at about 25 to 30 mph. BUT, as you drive it, it slowly goes back to the point where you can't go past half throttle again. I had a couple more runs and found that sometimes it would lose power momentarily and go again (whilst at full throttle). Power loss might just be me not wanting to high rev with the issue i'm experiencing. throttle will not allow full pull, limits ski to limp mode at about 30-32 mph, then sputters and spurts, wont let me go full throttle, will just bog and spurt if i hit it hard, but it doesnt stall, only spurts at full throttle. So I purchased part number OSD1223 from OSD Marine (didn't know about this forum yet) and I followed the instructions for rebuilding the carbs. I have an issue where the motor is struggling to get to full speed. Looking for any suggestions on the issue. Some times you can get it to 5k then let off the throttle and quickly go full I went with that as my start point as my condition was it runs and idles fine but once you give it fuel it wont take past half throttleit starts cutting out and missing with the occasional backfire and will eventually die out. The problem is one engine seems to run fine, the other doesn't it just won't rev over 3000 rpm. I examined the prop and there is nothing inside blocking anything. It has no power. Night our 04 sportster last year ran fine. Also, the gas could be stale or contaminated, or the fuel line may be clogged. It looks just like it did when you stored it away, yet something is amiss. Use a mild soap to clean the exterior. I changed out the Coil, same results. I've idled both engines to let them break in a little, and now it's time to run the boat. Put charger on it and decided battery was old and needed to be replaced. I tried slowly throttling up and see if I can get past the bog but no dice. But before that I did winterize it and stable the fuel with the full tank Of gas. Then out of nowhere it will go full throttle and run perfect and fast the rest of the When you first ride them after not having being ran for a period of time they seem fine down low but won't clean out and run up on top (full throttle'ish). About 20mph or 3,500 RPM's. I tried taking it out it would not go over 20 mph at high rpms . Aug 10, 2005 · Post any Sea-Doo technical questions you need answered here. Doesn't bog down just doesn't go. Wonder if it just fell out when I pulled it out with trailer or if there is a more serious problem? 395xp won't start after refueling OK I got the 1995 xp in the water today fired right up gas tank full (may have bad gas)it ran for about a min fine fuel light came on (itisfull)barely made to back to trailer wide open it wouldn't run acted like not getting fuel tried to feather gas feed to see if improved but it didn't never died but would not accelerate will start and idle fine I just bought I usually do a day worth of riding and when I first put into water it wont run full throttle until after being warmed up for about 20 minutes. Regular inspections help catch problems early. died in full throttle. It does seem to hesitate if you mash the throttle from a standstill. Starts and idles fine, it has strong acceleration from a standtill but won’t rev up to full rpm. will let me run it to 30 mph with no spurting I need to back off the throttle a little until it hooks up and then I can punch it and it will take off to 55 no problem. Engine isnt miss fireing just won't rev all the way up. My My sea doc recently had an oil change and they put too much oil into the ski. I have one running but can't quite get the second. Brought it back to the trailer. 2020 ski doo 600 ace, engine light and 1 long beep. I was riding for several hours and all of a sudden got a heavy vibration when applying throttle and noticed a loss in power. Apr 12, 2025 · Ensure the throttle and steering controls move smoothly. I have a 97 gtx just hit 50hrs. Would this boot cause issues with turning/slow acceleration with throttle wide open? The weird thing is that if I stop the boat and then start it up and quickly give it throttle, I can go almost full throttle and it seems like there is nothing wrong with the boat and performs great. Thanks Hello and good evening, I just went through my entire fuel system and rebuilt the carbs, replaced the fuel selector valve, replaced all the gray lines, and cleaned out the filter. fttow, jkcl, kf0w8, sojfss, ko4hn, zwusfq, 2fxhi, i0pp, rzjy9j, f7zgi,