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Help!! 99 XP won't start.

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look at these dirty things


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O-rings are in perfect condition, just gotta get some carb cleaner tonight and hopefully have some time tomorrow to finish these up.
 
Okay, RAVEs are clean. Next problem, the motor will turn without the RAVEs in, but just one clicks and beeps with the RAVEs in. What am I doing wrong here?
 
It's because it requiring more juice from the battery to turn it over with the raves in, and there just isn't enough power.
 
Ok guys, OP is having trouble posting. Says no matter what he tries he can't post. So he has PM'd me with further questions.... And I'm stumped, maybe y'all can chime in and help figure out his issue or help him figure out why he can't post.... He has changed the rectifier and has new charged battery and is getting appropriate voltage while resting and cranking... His problem is that is starts just fine on the trailer but not in water.... OP says it cranks in water but will not start. Compression numbers are 125 and 130.... I'm lost, I guess until he gets his posting issues solved, I'll be relaying suggestions to him via PM
 
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Seems as though I can post now. WOO! This has been pestering me for the past week. Still can't post long messages so I'm gonna work around it.

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I dunno man, seems to me like a battery/starter issue considering it'll start on the trailer and not under load... I know you put a new battery in, have you checked ALL battery and starter and ground connections? Not only that they are tight, but that they are CORROSION FREE? Like even the connection to your starter?

So, if you start it on the trailer, and slowly push back to where the pump is submerged, does it die?
 
Need to double check grounds, and I haven't tried backing it in running. The ramp I use is a pretty busy one seeing as it's the only one on the lake, I don't think they'll take some 23 year old, hogging the ramp lightly :p. It might slow down a bit now that temps are starting to drop but we still saw 96 midday down here today.
 
What is the voltage on the battery when you are cranking it in and out of the water? Might be a bad cell in the battery.
 
Alright, battery is charged up again, 12.6 V sitting. Back to not starting, now it'll just buzz if you try to start it. It seems as though the sound is coming from the front E-Box but it's hard to tell.
 
Check the starter solenoid, you can jump across it with screwdriver to see if it will turn over then
 
Got all excited today to take the ski out. New plugs, brand new battery, drained the old gas and oil, brand new gas and oil. Started up on the trailer with a little help feathering the throttle, which I think is normal after it sat for a few months. Thought, "okay let's do this :D". Backed it down the ramp. Tried to start it on the trailer in the water, BOOM!. Started right up. Got really excited at this point. Got it off the trailer and tied it off to park the truck. Got back, started it just to make sure one last time before I got out in the current of the river. Started right up. Killed it, pushed out into the river, tried to start it out there and.... Chug chug chug chug chug.... Grrrrrr. Nada. Killed the battery trying. Had this battery tested at the store right out of the box. Had 450 CCA. It's normally a 325 CCA battery. I thought it would have no problem starting now, but I guess not. I guess I have no choice now but to pull the head and see what's going on inside. Everything else checks out. New rectifier is charging when it runs on the trailer, plenty of current to the battery. Nothing in the drive shaft, or pump. Nothing in the intake grate, or wrapped around the drive shaft. I'm just baffled at this point. Normally if a motor is bad it won't start at all or runs poorly. Runs strong as an ox out of the water.


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In post #10 you checked compression and it was good. Have a new battery that checks good. New rectifier is working. Runs on trailer but not in the water.
In the water the engine is loaded while out of the water the engine is not loaded not requiring as much fuel to run is my assumption.
I believe I would check my fuel delivery starting with the fuel baffle working my way to the carbs. Fuel selector valves are known to wear out and restrict fuel flow. Internal carb filters periodically get clogged restricting fuel flow.
Sooo...I would probably do a complete fuel system overhaul even though you stated in post #1 that fuel system was already gone through. If my assumption is incorrect please disregard.
 
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Okay, update. This must be a carbs related issue for sure. Took it out after tinkering a bit, fired it up on the trailer, backed it into the water still running. Killed it. Started again in the water this time, turned over and ran. Killed it, started it again in the water, turned over and ran. Killed it. Jumped on, tried to start it, no dice. Jumped off, started right up. Decided to jump on while it was running, revved it up ad I get 5k WOT. Idle is at 2400 under load and on trailer. Took some videos and some pictures. Videos are upside down but they're more for so sound than the picture.

045.JPG

[video]https://youtu.be/EugdcilaQls[/video]

[video]https://youtu.be/K3t4LxwiuK8[/video]
 
Has it always had that tapping noise before and after the rebuild? Also while in the water does it crank as strong as it does on the hose?
 
XP 787 said:
Has it always had that tapping noise before and after the rebuild? Also while in the water does it crank as strong as it does on the hose?
Click to expand...

It always had a slight tapping noise. just figured it was part of the 2 stroke. I might be a motor mount. Need to investigate. Cranks just as strongly for the first couple starts the I'm guessing gets water in the cooling lines and bogs down after that. Then, when I fully submerge the pump when I get on, all it does is just crank.
 
Check battery voltage while running should be around 14volts midrange rpm. I am somewhat leaning away from this being a fuel issue only because fuel requirements shouldn't be any different in or out of water.
 
Fully charged battery starting out. I should be checking DC voltage while running, right? I rigged a 787 rectifier in there as you can see in the first video, per suggestion earlier in this thread.
 
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