Honda 4-stroke 90HP carb issue-starving for fuel

[stephie]

Desperately need some help. My engine absolutely starves at mid-range rpm's, between around 1200-2200. Idling under 10 or 1100 or running it full out is ok, but in that throttle range it sounds like it's missing and not getting fuel. I had the carbs cleaned and both fuel pumps replaced. It can't be a gas issue, because it only does it in that range. Anyone else have or solve this problem?!!

 

[psteurer]

Re: Honda 4-stroke 90HP carb issue-starving for fuel

Not sure of this one, but most carburetors have 3 circuits. These are an idle circuit, intermediate circuit, and high speed circuit. I would suspect something is clogged in one of the carbs intermediate circuit. Do you have a manual for this motor?

As a quick fix, you could try running Sea Foam in your gas. Run about 1-2 oz per gallon of fuel. If it is a small piece of crude, Sea Foam might dissolve it. Also, if the motor sits for 2-3 weeks without running, it is best to drain the carburetors of fuel. Honda carbs have very small passages and they are very easy to clog.

 

[stephie]

Re: Honda 4-stroke 90HP carb issue-starving for fuel

Not sure of this one, but most carburetors have 3 circuits. These are an idle circuit, intermediate circuit, and high speed circuit. I would suspect something is clogged in one of the carbs intermediate circuit. Do you have a manual for this motor?

As a quick fix, you could try running Sea Foam in your gas. Run about 1-2 oz per gallon of fuel. If it is a small piece of crude, Sea Foam might dissolve it. Also, if the motor sits for 2-3 weeks without running, it is best to drain the carburetors of fuel. Honda carbs have very small passages and they are very easy to clog.

Thank you so much...

 

[TheOrganicMechanic]

Re: Honda 4-stroke 90HP carb issue-starving for fuel

The intermediate/ transition ports in the carb could be the problem, as stated above. After the carbs have been cleaned and reinstalled they must be placed on a sync gauge and synchronized for proper off idle operation, make sure you're mechanic did this.



Ben
Browning Marine Service - FL
browningmarine@yahoo.com