In reading thru this thread, it appears that checking the working of the accelerator pump has not been done. If true, then do this simple test:
- Let the boat sit for a day or more… i.e. the same condition for when you experience a no start unless you spray gas into the carb but do not try to start it.
- Instead remove the spark arrestor and with your finger fully open the choke plate (it will move open without and damage to the mechanism).
- Using a flashlight look down the throat on the same side as the choke plate and have a buddy move the throttle to fully open in a nice smooth stroke. Come back to idle and repeat two more times. Again, the engine is NOT running, no reason to even have the key in the ign.
If you do not see gas squirting into each of those 2 barrels (a small stream like coming out of a syringe) for each stroke then one of two possibilities:
- accelerator pump is not working and thus need to rebuild the carb
- your carb is leaking fuel somehow and thus would start by rebuilding the carb and looking for issues (like a crack).
To determine which, do this immediately following the above test if there was
no squirting.
- Start up the engine with your trick of spraying gas down the carb, let it run for a few minutes at idle. Then shut down and repeat the first test.
- Now if see a squirt, accelerator pump working, and your carb is leaking its gas somehow. If no squirt, then the accelerator pump is bad.
If during the first test you did get 3 good squirts, then I need to think about it more. Please post results of test(s). Thanks.
