Boat ran great for a year before trash got into fuel filter, making boat run rough and shut off. I rebuilt carbs, adjusted floats, replaced intake gaskets, cleaned tank and it has never been able to go without bogging and starving. I think there is not enough pulse pressure to operate fuel pump. Compression is 100-105 on cylinders. Below are other things tried:
- Install gauge between pump and carb with clear hose to verify pressure and air bubbles (low in my case with new and old pump, no bubbles for me)
- Bench test pump using proper procedure (good in my case)
- Test vacuum between pump and tank (high indicates restriction. I used MityVac to test. No restriction for me)
- Install new pulse limiter and check that pressure coming from fitting/hose when cranked (helped some in my case, but pressure not real strong)
- Check pulse limiter hose going to fitting on pump for leaks, cuts (good for me)
- Run off portable tank with hose directly to pump (didn't make difference for me)
Here is link to test video:
https://youtu.be/I63im862224
- Install gauge between pump and carb with clear hose to verify pressure and air bubbles (low in my case with new and old pump, no bubbles for me)
- Bench test pump using proper procedure (good in my case)
- Test vacuum between pump and tank (high indicates restriction. I used MityVac to test. No restriction for me)
- Install new pulse limiter and check that pressure coming from fitting/hose when cranked (helped some in my case, but pressure not real strong)
- Check pulse limiter hose going to fitting on pump for leaks, cuts (good for me)
- Run off portable tank with hose directly to pump (didn't make difference for me)
Here is link to test video:
https://youtu.be/I63im862224
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