150hp stall if turn the throttle more than 1/6

yoman321

Recruit
Joined
Aug 13, 2012
Messages
2
Hi everybody.
I have a 150 v6 carburetor outboard (Perhaps it is v135 or v175.I am not sure because it is 3-4 hand engine with no label on it but I believed that those structure should be similar.)

When I start the engine, it run smooth in idle speed.
If I go forward, there is no problem even I open the throttle a little bit.

However, if I start open the throttle more, the engine speed will become slower.If I make it WOT, the engine will become very very slow and then stop.

Do you guys have any idea on it ?
Sorry for my poor English.
 

yoman321

Recruit
Joined
Aug 13, 2012
Messages
2
Re: 150hp stall if turn the throttle more than 1/6

I just replaced the fuel bump diaphragm but no luck
any idea ?
 

m.qualls89

Petty Officer 2nd Class
Joined
Jun 4, 2012
Messages
133
Re: 150hp stall if turn the throttle more than 1/6

Try cleaning your carbs. Seafoam might help also.
 
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