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Old 10-07-2015, 03:03   #1
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Yamaha 3.5 hp

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 rÍvs she cuts out after 7 minutes. She will start after a few minutes.

Any suggestions
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Old 10-07-2015, 06:22   #2
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Re: Yamaha 3.5 hp

Dirty fuel filter
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Old 10-07-2015, 06:33   #3
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Re: Yamaha 3.5 hp

I will give it a try thanks
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Old 10-07-2015, 07:31   #4
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Re: Yamaha 3.5 hp

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 )
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Old 10-07-2015, 08:00   #5
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Re: Yamaha 3.5 hp

Quote:
Originally Posted by CSY Man View Post
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
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Old 11-07-2015, 05:13   #6
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Re: Yamaha 3.5 hp

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
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Old 11-07-2015, 08:59   #7
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Re: Yamaha 3.5 hp

Quote:
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?
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Old 11-07-2015, 12:59   #8
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Re: Yamaha 3.5 hp

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