will not plane

[bigwheel53]

I have a 92 150 carbed it runs great if not in gear. it will not go on to plane i have not warning lights I have good compression. I have check the bushing in the prop and it looks good. can some one give me a idea. so far everything checks out in the water in runs great to about 2300 then no more if it is out gear gear it goes to 4 or so. Ideas ???:

 

[cousinabe]

Re: will not plane

Sones like a fuel restriction. Possibly bad fuel pump diaphragms or trash in the carbs.

 

[k4ubr]

Re: will not plane

what size wheel?? it solds like bad carbs. in the high speed side(it sounds like fuel problem) oh if the hub is slipping your rpms would jump right up.

 

[JB]

Re: will not plane

Forget the fantasy that she runs great. She is running lousy and on probably 4 or 5 cylinders.

I am reading "if it is out gear gear it goes to 4 or so." as, "when out of gear it goes to 4,000rpm or so.". That is not an engine with 6 cylinders making power.

I don't know enough about YamaZukis to tell which you have, but I subscribe to the suggestion that you have one or more non-functional carbs.

What happens if you squirt some fuel mix into each carb when at WOT?

 

[Mas]

Re: will not plane

Try squeezing the fuel line bulb when it's acting up. If improvements are noticed, likely a fuel pump issue.

MAS