Yamaha 150 HP - 1500 RPM

[claudiodias]

HI,

I need help. I have an outboard engine yamaha 150 hp 4 stroke - Year 2005

The engine dont pass the 1500-1600 RPM when I go forward. However in neutral he goes to 5000 rpm and seems to be normal.


Can anyone give some help about this problem.

Thank you

[TownsendsFJR1300]

Any alarms?

With the throttle pushed forward, it just stays at that RPM? Running rough, or ?

[claudiodias]

No Alarms.

Don't pass the 1500-1600 RPM with the throttle forward.

There is nothing strange in terms of noise and the cooling system is working.

Thanks for your reply

[rodbolt17]

does the alarm system work?

have you actually tested the alarm system?

most likely you have a clogged injector or a clogged VST filter.

[claudiodias]

Hi again,

Thank you for your help, but still I do not have my engine running

I change all the filters, clean the injectors, change the Thermostat, spark plugs and the engine dont pass the 1500-1600 RPM when I go forward and make a strange noise, like as if I was not working in the 4-cylinder. However in neutral he goes to 5000 rpm and seems to be normal.

[ausnoelm]

Forget revving it in neutral, it proves absolutely nothing.