1982 Evinrude 88

[TRACKMAGNA17]

Just brought my boat out of storage. I hooked up the muffs on the motor and fired it up. water to muffs from hose was warm, but not hot by any means. It was pumping water out of the motor like normal and I let it warm up for several minutes before Idleing it up. Once it was warmed up I opened it up briefely a few times. Then a buzzer went off inside my shifter so I shut it down. After a few minutes I started it back up again and when I put it in gear and cracked the throttle again the buzzer went off. I felt the water coming out and it was warm,but not hot. The buzzer had a purple and a brown wire attached to it. Is this an engine temp alarm? If so where is the temp sensor and how do I test to see if its bad? The engine did not seem to be running extra hot cause I pulled the cover off the motor and touched each cylinder head with my hand. This alarm has never gone off before, but I've only owned this motor for two years. Also any other tests that I could do would help also.

Thanks,
Al

 

[ezeke]

Re: 1982 Evinrude 88

The tell-tale water flow lets you know that the water pump is functioning but not how well; it tells you nothing about the flow of water through the cooling passages of the engine.

The temperature switches are contained within the cylinder heads on the cylinder banks and have tan wires. When the temperature switch senses overheat, it grounds the tan wire leading through the harness to the horn in your remote control, completes the circuit and sounds the horn.

Since the temperature switches don't close on your engine until the temperature is in excess of 200 degrees, you should shut the engine down and not run it until the source of the problem is found and corrected.

The problem will normally be confined to the following four areas in descending order of likelihood: water pump needs rebuilding; thermostat system needs rebuilding; the water deflectors in the engine have moved or failed; or the temperature switches are bad. .

There are a number of infrared devices that can be used to measure the temperature of the cylinder heads to determine if the switches are bad.

 

[tashasdaddy]

Re: 1982 Evinrude 88

NEVER, rev you motor over 1500 rpms, doing this can cause a runaway motor you cannot shut down. without chokeing, or removing fuel source, possilby throwing a rod.

 

[HybridMX6]

Re: 1982 Evinrude 88

I am not sure, but aren't there different alarm tones or how frequent it is for different things? I'm not positive about a 1982 motor, but I know I've heard mention of newer motors having different alarms for Low Oil, No Oil, Overheat, etc. Just curious if it's actually an overheat alarm or something different. I don't know if '82's had VRO's though. If he can touch the heads with his hand, it doesn't sound like it's overheating.

 

[dieselcat]

Re: 1982 Evinrude 88

I have a 95 88hp and the same thing happened to it,buzzer sounded after idleing for a while.Ended up needing to replace the impeller,after that i have never heard the buzzer again.

 

[ezeke]

Re: 1982 Evinrude 88

The VRO systems were not available in 1982, so that the only warning horn signal on a stock V4 OMC motor was the overheat, a constant alarm.

 

[dieselcat]

Re: 1982 Evinrude 88

same with my motor,constant alarm.new water pump impellar and bam no more buzzer.