Carb or prop causing bogging mercruiser 260

[CAPTKEV85]

Just splashed my boat and I am having the same problem as last year. When I floor it the boat falls on its face and then it takes off. So far I have done plugs, wires, cap, rotor, all filters, and rebuilt carb. Last year people said that the prop could be to large for the boat, but I feel when The secondaries on the carb open thats when the boat boggs. Is there a secondary adjustment for a quadrajet. Once the boat gets past this issue it will wind up to 4500 rpms and screams. Any Ideas??????

 

[Bondo]

Re: Carb or prop causing bogging mercruiser 260

Once the boat gets past this issue it will wind up to 4500 rpms and screams. Any Ideas??????

Ayuh,.... Yer on the low end of the rpms at wot range, but not bad...

I think it's a Carb issue, but I don't do rochesters...

The older Merc manuals might have some Ideas for tunin' it,..??

 

[CAPTKEV85]

Re: Carb or prop causing bogging mercruiser 260

I feel its the carb to I rebuilt it two weeks ago and the float measurement is correct and all passages are clear. I feel that the secondaries are coming alive to late and the boat struggles to get going. But then from 3700-4000 rpms is a boggin range also. I will hear the secondaries open in this range, so I'm thinking secondaries are the issue.