Honda 150 drop in Power

[Trailer Bloke]

My Honda 150 has suddenly lost power

It feels like a 115

It has trouble getting on the plane and is 1500 RPM down at WOT

Have checked or changed the following:

High pressure fuel filter

All other fuel filters

Throttle cable

Any other ideas?

The fuel pipe is not kinked

I have checked the throttle and it is opening up to the bump stop

Apart from the loss in power the engine runs and starts great

Any suggestions?

[Hightower]

Fuel system, induction piping checked for obstructions and the throttle linkage operated from the control lever aside, I would be checking ignition system. Compression and sparks. You could easily be one cylinder down and it not be that obvious. I took my boat out after a service and found an HT lead that was off. It was only obvious when I discovered I had a lack of power and was one of the first things I checked.

The only other thing I can think of is the engine management system.

[Bigmuz7]

So youve lost 35 Hp ... Did you have a load in the boat by any chance ? because I have found this to be a supremely gutless engine That said .. if your WOT is down on your normal,, some other factors might be at play .. but I have found load to be a major factor here.. particularly when everything is running right

[Trailer Bloke]

Originally Posted by Bigmuz7

So youve lost 35 Hp ... Did you have a load in the boat by any chance ? because I have found this to be a supremely gutless engine That said .. if your WOT is down on your normal,, some other factors might be at play .. but I have found load to be a major factor here.. particularly when everything is running right

No everything (ie the load in the boat) has been constant

In fact I have another boat exactly the same- prop, weight, fuel load everything and that revs nearly 2000 rpm more

[BEJJ`s]

Hi, I also have a honda 150 and the same thing has happened to mine! Did you manage to fix the problem and if so what was it? thanks