Boat bogging

[Mccann32]

I have a 95 Rinker 4.3 alpha one merc the boat runs good for about 30-40 mins then will bog at full throttle and won’t even get up on plane top speed about 5mph when bogging what can it be it has me stumped ???

 

[Scott Danforth]

Chech your fuel vent

 

[Mccann32]

Chech your fuel vent

It’s clear

 

[Scott Danforth]

crack your fuel cap when it starts to bog. if you hear hissing and your engine comes back to life, your vent isnt clear.

test your fuel pressure.

 

[CaptnKingfisher]

Might be worth reading this post

3.7l bogs down after running under load for 30 minutes

Hello to all, I have been up and down this forum and want to thank you all for he great information. And here is my 1st post. I purchased a 1989 Thompson 20' Carrera with a 3.7L. The previous owner replaced the bellows, shift / throttle cables, regular impeller changes, regular oil changes...

forums.iboats.com