98 225 Johnson Ocean Runner RPM Loss

[xpress829]

I just purchased a 98 225 Johnson Ocean Runner. The motor ran great on the sea trial before I bought the boat, but after buying it and running it for an extended time the motor will bog down occasionaly. I checked the bulb and it was okay while running at the same time the problem happened. I think it is electrical. The voltage meter tops out at 16 and the gauge shows past that. Any sugggestions on what to look for?

 

[drem312]

Re: 98 225 Johnson Ocean Runner RPM Loss

Is it overheating at all? when you stop and let things cool down does it run ok again and then start the same cycle?

 

[OBJ]

Re: 98 225 Johnson Ocean Runner RPM Loss

If it's not overheating, no alarm and the block feels OK, check your spark when it start losing RPM. Dropping a cylinder will do that. Maybe just a coil went south....it happens.

 

[xpress829]

Re: 98 225 Johnson Ocean Runner RPM Loss

I don't think that it is overheating. I have no alarm going off, the pisser is strong and the water coming out is cool. I took the cowling off and could touch the motor near the thermostats and hold my hand there for a few seconds without it being to hot. It can really happen at anytime I have found out. I am taking it to a shop tommorrow morning and see what happens.

 

[Fl_Richard]

Re: 98 225 Johnson Ocean Runner RPM Loss

Just a warning.... Watch the voltage. I fried a power pack lickety split at ~18 volts.