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Dt140 will not go full throttle

Tcorbeil

New member
Hi there, I have a 1986 dt140 Suzuki

On a 16 ft bowrider.

The motor has great compression and fires up no problem.
Idles perfect and revs up perfect out of gear. No misfiring or anything.
Once I put it in gear and plane out the boat the motor does not rev up to full throttle. It feels like it's half throttle or so.. I have the trottle arm all the way down and it seems to lack power. I have tried trimming the motor up without any change.

Every now and then the motor will instantly red to full throttle but then back down again a second later.
New plugs are in the motor. New gas coming from a clean Jerry can.

Does anyone know what would be causing this?
Thank you for any suggestions and help in advance
 
check the fuel line including vst and the injectors as well.

Had a mechanic take it out and he thought it
Could be the stator...
I didnt think it was that case.

I pulled the carbs and cleaned them. Motor now rubbings like a champ.
Much have been the high speed jet as it fired up and idled perfectly.
Hope this helps anyone else.
 
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