5.7 mercruiser bogging in mid range

[bredman]

I have a 95 5.7 260 horse on a 20' mirage. Just lately it has started to bog and hesitate through moderate accelleration. If I hit the throttle hard it will run right up to 4400 without any work. If I accelerate easy it will bogg and hesitate until I back off the throttle and hit it again. I have tryied all the obvious problems , so far nothing. Checked timing, vacuum, comprestion, timing advance and had the carb rebuilt. Not sure where else to look

 

[akriverrat]

Re: 5.7 mercruiser bogging in mid range

those symptoms point to transition circuit in carb. is the engine diesling at all?

 

[McKenzie]

Re: 5.7 mercruiser bogging in mid range

carb or efi? if carb, the secondaries could be openning at the wrong time

 

[bredman]

Re: 5.7 mercruiser bogging in mid range

Thanks guys. The engine does not diesel at all and the secondaries may not be opening on time ,but had a tech sitting watching and he did not mention this as a problem. I was also told that the float may be set too low, is that a possibility?

 

[Bart Sr.]

Re: 5.7 mercruiser bogging in mid range

bredman---From the info I've seen here that is a possibility.It is also easy and cheap to check.