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coughing at mid to high throttle, warning siren comes on at low throttle

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AngieN

New member
Hello, I am really new at this, don't know much about boat motors, but learning fast.

I have a 60hp Evinrude outboard motor 79-81. First issue that started was coughing and dying out at mid high throttle (never quit). Now, when running on low throttle the warning siren comes on.

Have new battery, new plugs, new fuel. Checked amp reading,12.6 at low speed, 13+at high speed. I have an Evinrude Power Pilot.

Can someone plz give me an idea of where to start and what to check.

Thx Ang
 
Model Number?

How long have you owned this engine?

Did this engine run properly in the past for you... OR... is this how the engine acted from day one?

The sound you hear is not a siren... it is the engine's "warning horn" and the sound is considered a beep or beeping. That sound on your engine (if the engine is indeed pre 1984) would be warning you that the engine is on the verge of overheating BUT has not reached the danger point yet, hence the terminology "warning"... the point whereas one should shut the engine down to avoid problems.

The coughing/dying out/hesitation, if this takes place as you apply throttle... that is normally caused by fouled carburetors due to sitting, and if so, the cure is to clean and rebuild all of the carburetors.

This scenario could also be caused by a sticking timer base under the flywheel (keeps the timing retarded somewhat)... OR... having the carburetor butterflies start to open too soon in relation to the timing. The butterflies should just start to open when the scribe mark on the metal cam is dead center with the carburetor throttle roller.

NOTE: The throttle cam roller should be approximately 3/8" in diameter. Some of the ealier model rollers have a clear shield/cover over a smaller black roller (approx 3/16")... the clear shield breaks away leaving the smaller roller. This causes the throttle butterflies to open later than normal, and of course causes the engine to NOT obtain a full throttle setting of the butterflies.
 
kimcrwbr1 said:
Sounds like you have multiple issues first being the cooling system, do you know hoiw old the impeller is if not just replace it to eliminate that variable. The High speed miss can be any number of things first off clean all the connecters in the motor good and sand all grounds metal to metal. Fix any bare or broken wires and use dielectric grease when putting the connectors back together. It could be out of sync also you will need a manual to show you how to check/adjust sync between the timing advance and throttle opening. Put some seafoam in the fuel tank and replace all the fuel lines do not run WOT until you are sure fuel delivery is correct. Do you mean volts instead of amps? It could be the rectifier causing the low readings but the battery has nothing to do with the ignition is that an electric shift? What is the model number of your motor so we know what we are looking at?
Click to expand...

Hi, I had the lower end repaired 6-8 years ago, not sure if they did the impeller.

Yes, sorry, I mean volt not amps. Yes it is electric shift,( if you mean do I have a throttle shift attached to the electric start),

Model #E60ELC1A
 
Model#E60ELC1A.

I have owned it for 13 years, never any issues until late last summer, these issues started.

Confused...1) being as it is water cooled, I can see water ejecting as I always have, why an overheat issue?
2) why would I get the overheat warning only on low throttle and will go away on mid to high throttle (still coughing)
3) the warning I hear is a constant squeal from the power pilot, is that what you mean?
 
You have a 1981 2cyl 60hp Evinrude. The lower unit is mechanical shift (not electric shift).

The overheat warning horn is normally concealed within the control box.

The water pump would at least have been dismantled when the lower unit was worked on 6-8 years ago. And since you haven't mentioned any water pump work since, that is the last time the pump assembly or at least the impeller could have been replaced... you've been quite fortunate.

I assume that when you first start the engine, the warning horn is silent, then within a short time, the warning horn starts to function emitting a constant steady beeping sound. If so, after a period of so many years, I would strongly suggest that you have the entire water pump assembly replaced and also the thermostat... not just the impeller.
 
Thank you so much. I now have a bit better understanding of my motor. Will check out the items suggested. I will let you know how I make out. If I ever come south, will drop in and say hi.
 
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