handymandbq

Hello everyone.I am a new jetski owner, but know enough about turning wrenches to be dangerous.I got this jetski from my brother for nothing as it was not operational.It died on Lake Murray summer of 2009 and sat until I got to start working on it this month.I replaced the battery and found the impeller frozen up solid.I also replaced the load relay so the bilge pump and trim motor now work.It now cranks over quite well, but does not seem to want to fire.I pulled all three of the plugs and they all have good spark.Any ideas on what may be causing it to not fire? I put fresh gas and oil in the tanks. I'm not sure if there is a priming procedure to follow.I was going to check compression next, and then timing. I have no ides how to check timing on these, however.How can I check to make sure I am getting fuel to the carbs?

aaron9350

Check compression first, the timing is controlled by the crank magneto somewhat so timing is fairly simple on these skis. Will it start if you spray starting fluid in the intake?

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1998 TS1000R, stock; 1999 TS770, Solas impeller

handymandbq

I have not had a chance to try starter fluid yet. I was thinking of trying that tomorrow, but I am not sure how these react to that.I have used it on my snowmobile.

98yota

Just like on your sled, if the motor has spark and compression it should fire on starting fluid. This will tell you your problem is fuel related. Also like your sled if it has been sitting a long time, it helps to prime the fuel line come from tank to carb as the little pump has a hard time pumping with an air bubble. Go easy with the starting fluid as the oil is in the fuel so running on starting fluid makes for poor lubrication.

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1993 Yamaha WaveBlaster 701
1989 Yamaha WaveJammer 500

handymandbq

So I tried starting fluid, and it kind of sputtered and spit a little bit.Then I checked compression, and it was 130psi on all three cylinders.I traced the line from the fuel tank, and noticed the little in line filter had gas in it.I then traced that to the fuel pump.I removed each of the lines coming out of it one at a time.When I cranked it, each fitting squirted fuel out of it.I thought the carbs might be gunked up so I sprayed carb cleaner into the throat, and when I cranked, it fired right up, then died.As long as I keep the carb cleaner to it, it runs.I wanted to check the lines to see if they are plugged up after the pump, but can't figure out how to get these metal crimps off of them.Could the carbs be gummed up from sitting so long?How hard is it to rebuild these?Can I get them un-gunked without removing them?

98yota

Unfortunately the carbs need to removed and disassembled to be cleaned thoroughly. After you pull them apart, soak them overnight in carb dip. Use a small wire to clean all of the small holes and passages.

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1993 Yamaha WaveBlaster 701
1989 Yamaha WaveJammer 500

handymandbq

I was able to confirm fuel is going to the carbs by pulling one of the hoses off at the carb. I think I am just going to buy a used one off of e-bay instead of hassling with trying to rebuild all three of these carbs.I'll update the thread after I get them installed.

98yota

Buy a used ski or set of carbs? I would rebuild the carbs, you will find they are very easy to pull apart and clean, and it will be much cheaper than a new ski or carbs. Used carbs will most likely need to be rebuilt anyway.

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1993 Yamaha WaveBlaster 701
1989 Yamaha WaveJammer 500

handymandbq

I bought a used set of carbs, if you rebuild them, is there a rebuild kit you need to purchase?

98yota

What carbs are they? There is probably a kit available.

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1993 Yamaha WaveBlaster 701
1989 Yamaha WaveJammer 500