Yamaha 3.5 hp

[ianmkent]

I have a air cooled yamaha 3.5 hp outboard. She starts very easily but only runs for 10-20 minutes before cutting out.

At higher rêvs she cuts out after 7 minutes. She will start after a few minutes.

Any suggestions

[CSY Man]

Dirty fuel filter

[ianmkent]

I will give it a try thanks

[CSY Man]

Also check for clogged vent in fuel tank.
Probably built-in tank with vent in the filler cap.

My last dink motor was a Yamaha 4 HP, four stroke. Best motor I ever had,
Pushed a 310 @10.9 knots with a 225 guy onboard, (me )

[ianmkent]

Originally Posted by CSY Man

Also check for clogged vent in fuel tank.
Probably built-in tank with vent in the filler cap.

My last dink motor was a Yamaha 4 HP, four stroke. Best motor I ever had,
Pushed a 310 @10.9 knots with a 225 guy onboard, (me )

Hi,

Quick question does the same apply to a two stroke? Thanks

[ianmkent]

I think I have solved the problem a closer look revealed what appears to be flakes of rust in the fuel line. It started first pull

[CSY Man]

I think I have solved the problem a closer look revealed what appears to be flakes of rust in the fuel line. It started first pull

So did the flakes of rust clog up your fuel filter, or clog up the carburetor?

[ianmkent]

Just the fuel filter , I took the tank of and its got lots of loose rust in it. So I cleaning it out.