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Our toy died Sat. 91 Waverunner LX, 650 single carb.
It ran fine for an hour or so. Then about a mile from the beach, it acted like it lost power, and full throttle took a long time to get it going, and it didn't go like it had been. Seemed to be spinning its wheels, so to speak.
When flushing, it would only rev up so far, then act like it was missing, or overloaded, or on a rev limiter or two step box.
Also noticed a nick in one of the impeller blades, but the engine and impeller seem to turn freely by hand by the coupling, except for compression.
Compression is 130 in front, 135 in back. Plugs were new this year, 10 hrs max, look ok, dark brown/grey. It has a new fuel filter.
It has always taken a lot of cranking to start the first time, and never would idle for more than a minute, without some more throttle. Also, occasionally it would bog if you went totally wide open, but this has never been a problem, we just go as fast as it seems comfortable.
I removed the carb Sun, disassembled and reassembled with the old gaskets.
Everything looked clean, jets, filter, etc. Last person to work on it nearly rounded the slots out of some of the screws....
Put it back together, and now it will not start. Fired with starting fluid, and caught on a couple times, but would not run.
A timing light says both plugs are firing.
A carb gasket kit is on order.
One head bolt on the front port side has a small external water leak when flushing, and I assume, when running, but based on the compression, it does not appear to leak water into the cylinder. I removed the exhaust manifold and retorqued all the headbolts in May.
Only other thing is that it may have a somewhat oil rich mixture in the tank, since I put oil for 3 gals in but it only took 2 gals of gas, twice in a row.
Any suggestions?
Long winded, sorry. Thanks for the help.
It ran fine for an hour or so. Then about a mile from the beach, it acted like it lost power, and full throttle took a long time to get it going, and it didn't go like it had been. Seemed to be spinning its wheels, so to speak.
When flushing, it would only rev up so far, then act like it was missing, or overloaded, or on a rev limiter or two step box.
Also noticed a nick in one of the impeller blades, but the engine and impeller seem to turn freely by hand by the coupling, except for compression.
Compression is 130 in front, 135 in back. Plugs were new this year, 10 hrs max, look ok, dark brown/grey. It has a new fuel filter.
It has always taken a lot of cranking to start the first time, and never would idle for more than a minute, without some more throttle. Also, occasionally it would bog if you went totally wide open, but this has never been a problem, we just go as fast as it seems comfortable.
I removed the carb Sun, disassembled and reassembled with the old gaskets.
Everything looked clean, jets, filter, etc. Last person to work on it nearly rounded the slots out of some of the screws....
Put it back together, and now it will not start. Fired with starting fluid, and caught on a couple times, but would not run.
A timing light says both plugs are firing.
A carb gasket kit is on order.
One head bolt on the front port side has a small external water leak when flushing, and I assume, when running, but based on the compression, it does not appear to leak water into the cylinder. I removed the exhaust manifold and retorqued all the headbolts in May.
Only other thing is that it may have a somewhat oil rich mixture in the tank, since I put oil for 3 gals in but it only took 2 gals of gas, twice in a row.
Any suggestions?
Long winded, sorry. Thanks for the help.
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