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  Motor alarm on 88 Johnson 40hp

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Author Topic:   Motor alarm on 88 Johnson 40hp
DamselFly posted 03-12-2002 10:33 PM ET (US)   Profile for DamselFly   Send Email to DamselFly  
I have a 40hp VRO Johnson on a 13' sport. This Sunday, less than 2 minutes after starting up and running up the river the motor alarm came on. The engine was peeing as normal. I let it sit a few minutes and started it up again. No alarm. I continued to run it all day with no problems. One thing I did forget to do was prime the fuel bulb. Could low fuel pressure cause the alarm to go off? Also, the VRO pump is not hooked up and I use premix.

DamselFly

David Ratusnik posted 03-13-2002 02:41 PM ET (US)     Profile for David Ratusnik  Send Email to David Ratusnik     
Dam- Had the same thing happen about a year ago on my Johnson 225. I premix as well. It all went away by replacing the primer bulb. Yours maybe trying to tell you something. David
Tom W Clark posted 03-14-2002 01:42 AM ET (US)     Profile for Tom W Clark  Send Email to Tom W Clark     
DamselFly,

It could be a number of things but I would suspect either a fuel restriction or over heat situation. It is possible far an engine to overheat even with coolant flow, though much less likely.

What year is your motor?

whalerron posted 03-14-2002 09:59 AM ET (US)     Profile for whalerron  Send Email to whalerron     
A motor that is not getting enough fuel will run lean and a lean motor tends to run hot. Maybe there is some substance to your theory about not priming the fuel line completely.
Bigshot posted 03-14-2002 10:55 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
Could have been a dirty contact from sitting. I would not worry about it unless it happens again. Just because it is peeing does not mean it is cooling. That tube will pee even if you have blockage. If it does it again, try the pump first before doing anything crazy.
DamselFly posted 03-14-2002 01:47 PM ET (US)     Profile for DamselFly  Send Email to DamselFly     
Tom,

The motor is an 88 model. Could a motor overheat less than 2 minutes from the dock? Also, is there a reset on the motor? I just let it sit for a few min, then cranked it and the buzzer was gone. Also, I had put about 3 hrs on it the weekend before with no problems, and I did prime the bulb that time. ;)

Tom W Clark posted 03-14-2002 01:55 PM ET (US)     Profile for Tom W Clark  Send Email to Tom W Clark     
DamselFly,

Yes, I think it could overheat in two minutes but it's not as likely as the buzzer just misbehaving. I'm with Bigshot, don't worry about it unless it happens again.

If it does go off again (and you confirm that it is over heating) then do as Bigshot suggests and replace the water pump impeller and related parts. The tell tale stream is not a perfect indicator of a motor's cooling system condition.

No, there is no way to "reset" the buzzer.

David Ratusnik posted 03-16-2002 10:14 PM ET (US)     Profile for David Ratusnik  Send Email to David Ratusnik     
Dam- As indicated above, I've been around the block with the buzzer that scared you to death. The instant reaction is HEAT-- but not so. It is piddling fine. Before you tear it apart spending big money replace the bulb. If it goes away fine. Next replace the hose from the tank thru the bulb to your Johnson. It is not sucking fuel. David
David Ratusnik posted 03-16-2002 10:15 PM ET (US)     Profile for David Ratusnik  Send Email to David Ratusnik     
Dam- As indicated above, I've been around the block with the buzzer that scared you to death. The instant reaction is HEAT-- but not so. It is piddling fine. Before you tear it apart spending big money replace the bulb. If it goes away fine. Next replace the hose from the tank thru the bulb to your Johnson. It is not sucking fuel. David

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