2001 Johnson 175 Hp Wont Throtle Up

[JUST WANT TO FISH]

I'm Able To Idle And Pick Up Speed But Wont Go Full Throttle. Runs Rough And Sounds Like Its Bogging Down. I Disconnected The Fuel Line And Ran It On The Flusher Until It Died. I Pumped The Bulb And Started The Motor Put It In Gear And It Seem To Fix The Problem. When I Put It Back In The Water And Tried To Get On Plane It Would Not Go Full Throttle. Whats The Deal I Just Want To Fish.

[ob]

Without any more history of the engine it is guess work as to what your exact problem could be.There are a host of things that could cause such a condition.Failing fuel pump,restricted carburetors,blockage in fuel pickup or filters,overheat rpm limiting condition etc... If the engine has set out of use for a spell ,a common issue is fouled carburetor porting.You can somewhat test for this while running the engine in water under load as there is sufficient back pressure on the exhaust.If you can get the engine to start up ...before it dies try repeatedly pushing in on the key primer.If engine tends to pick-up or settle out,then it could be a fouled carburetor issue,as the primer allows fuel mix to bypass the carburetors and enter directly into the intake chamber.Subsequently while test running ,if engine begins to fall off try repeatedly pumping the fuel primer bulb.If this allows engine to pick up or settle out ,then it could be a failing fuel pump issue.Otherwise without more concise info on recent engine performance we're sort of grabbing straws here.Hope that helps some.

[Booberdoo]

I had an issue quite similar to this with my Johnson 70. Turned out when I was throttling it up the primer bulb was supple enough to suck shut and choke the fuel supply. Back down the throttle and the bulb would open up... this one had me frustrated for a while as I was in the middle of the lake at the time.

Now I look at the simple things before even considering anything else