1999 120 hp force bogging down

La tech

Cadet
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Aug 29, 2011
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Motor runs good for about 10 min then starts loosing power and will shut completly off. If i wait about 1 min will run good again. Have checked compresion before and right after stops and it is consitant around 150. Have checked fuel and it is good (no water). Thinking something in firing system but not sure what because it will start right back up. Any one got an idea?
 

La tech

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Aug 29, 2011
Messages
11
Re: 1999 120 hp force bogging down

checked and does not seen to be problem when it finnaly shuts down all the way its just like u turn off key.
 

pnwboat

Rear Admiral
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Oct 8, 2007
Messages
4,251
Re: 1999 120 hp force bogging down

When it starts loosing power, try squeezing the primer bulb. If it picks up, then it's most likely a fuel delivery problem. Probably a bad fuel pump diaphragm.
 

La tech

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Re: 1999 120 hp force bogging down

have checked already and fuel bulb is stays tight
 

pnwboat

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Re: 1999 120 hp force bogging down

Next thing to do then is to check for spark when it's acting up.
 

La tech

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Aug 29, 2011
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Re: 1999 120 hp force bogging down

when I get back to plugs still shows spark bogs down when full throttle and kinda hard to check at that time and when it does shut down when u get boat under control and slowed down enough to try. It will start back up just will not plane out boat. Is there a way i can check resistance on stator. I have had another smaller force that had a similar problem and had an extra stator swapped out and fixed problem this time no spare parts.
 
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pnwboat

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Oct 8, 2007
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4,251
Re: 1999 120 hp force bogging down

Yes, you can check the stator. Disconnect and check the Green/White and White/Green stator wires. You should read between 500 - 700 OHMs between those two wires .
 

La tech

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Aug 29, 2011
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Re: 1999 120 hp force bogging down

stator checked out at 682 ohms have not had chance to test after running yet.
 

La tech

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Aug 29, 2011
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Re: 1999 120 hp force bogging down

Well here goes solution problem solved runs great now. Took boat out and kept trying and rechecking everything and it showed itself lol short piece of fuel line right before fuel pump was deteriorated from inside and would not flow enough at high speed replaced cleaned fuel system and runs great. Thanks for all advice hope this helps someone else.
 

pnwboat

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Oct 8, 2007
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4,251
Re: 1999 120 hp force bogging down

There you go! Glad you were able to figure it out and thanks for getting back to let everyone know what you found.
 
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