Strange activity on 50hp Merc. 2001 outboard 4 stroke

[Frosty]

When the engine is running both the bulb and the valves with in are just letting fuel pass through.

The bulb and its internal one way valves work only when you pump it up for starting.

It is possible that an internal valve in the bulb is partialy blocked, stuck.

It may also be that someone has fitted an inline filter under the cowling and this is partialy blocked.

[ttreewalkerr]

This is a upnorth cabin it's at,, right now it's on blocks and begining in May i can get it in water... There is no one really around to borrow a tank from...

But one fact, the bulb should pump,, it does'nt,, it's like a mushy stress ball that just deforms no colapsing.

When the floats are full and floats are up,will that stop the bulb from pumping ?

Or does this no pumping bulb raise a flag ?

[ttreewalkerr]

Remeber in my previous post that i did the bulb squeeze at hi RPM, same stress ball feel,, no real pumping.

Thats gotta be it.

[Frosty]

You can buy replacement bulbs, and if the pipe is old and hard replace that too.

While its up on chocks take the tank apart and clean it. Try blowing into the tank, it should be quite free.

[ttreewalkerr]

Originally Posted by RMSOSF

still sounds like carbs to me. Possibly the passages leading from the high speed jets to the inmmulsion tube. I could also be an improperly set float level in the carbs.

I went up to check out boat, still on blocks, bulb seems fine, squeezed it and it worked properly. Heard gas shootign in the carbs as i squeezed... Hose is still new looking.. 2002...

Like i said i cleaned the carbs real good last year still had the problem.. Could it be float improperly set ? All other RPM ranges runs fine,, just high RPM is the problem..

[ttreewalkerr]

Could float adjustment cause this problem ? Not enough fuel ?

Bowl runs out and leans the engine ?