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Clean the carburetor / repair float and float valve.

Correct---fit 5.5 and 6 hp 1960 to 79.----Wonderfull / simple / easy / cheap to maintain motors they are.

Just ordered 4 SIERRA head gaskets for the 6 HP.----Far cheaper compared to factory and never an issue with them.

???----Holes in small OMC flywheels have been 1/4-20 NC threads since 1950 !

Use 7 mm wire core only !

??---You said it does it with the flywheel off the motor ?

342513 ?

Used to sound an alarm if motor should overheat.----Custom installation.-----Best to install a new impeller every 5 years.

I would never install an aftermarket ( paper thin ) gasket for this V-4 / V-6 application.

Bin working on outboards since 1968 or so.-----But , find a gray haired / caring mechanic in your area to help you with this.----Not many of those guys left I think.

Remove sparkplugs.----Rig up a way to measure torque to turn flywheel.-----Record results.-----Remove lower unit and repeat the test.

Sorry----This may be a motor assemble from many sources.----I can offer no further help on it.

Is the felt wiper too tight ----Remove the breaker cam and test again.

Did you have the armature plate off?----Have never experienced that over many years / motors !----Side note.---Those U-shaped clips are not installed correctly on breaker points.

Perhaps one of the coils is rubbing on the flywheel.---Remember we can not see your motor.

A 1988 to 94 model.

Don't spend any $$$ until you have determined the actual condition of the motor.

With the right tools the flywheel is off in minutes.-----You have to do it or pay $100 / hr for a shop to help you.

If a motor is in good condition it idles SMOOTH.----When put in gear it will drop about 150 / 200 RPM and idle smooth all day long.----If it stalls a lot something is wrong.----Simple trouble shooting will find the issues.

I can see the vet bills $$$$ if boat came to a sudden stop.