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Facts------Got a call from someone looking for a used flywheel for a 1976 / 77 model 50 HP Mercury.-He had already bought a new starter.------Supplied the flywheel.-----Then got a call 3 days later and party said that his " mekanik " also needed the stator.------I said " let me look at your boat...

When the boat is floating in the water then the 52 degree water could be considered a heat source.-----Throw a few blankets over the dog house.-----Never tried this myself so beware.

The fourth item you need for proper operation of a 2 stroke is ---CRANKCASE COMPRESSION-------A most mysterious component of a multi cylinder 2 stroke engine.

Those driver coils are very reliable.----Funny that they would list different values for electric start.----Parts book seems to show one part # as a replacement.

I am going to be blunt here.-----You need the bushing and the factory o-ring to keep water out of the gearcase.----There is nothing wrong in the way they built / assembled this motor.---I can't believe that you would think of running it without the bushing or o-ring !---Use the factory o-ring...

I venture to guess that the owner is not well versed in 2 stroke oil mixing and how a 2 stroke operates.----My grandson uses a 1963 model motor and at 24:1 runs and trolls like it is still new.

The customer is usually right.----The customer has the coins to get this done.------But what other trouble shooting has been done to perhaps find the real problem ??-----I would simply take the oil pump discharge and T it to the oil pump intake line.-----Just make the oil pump circulate the...

Model # is ?

Correct ---you have to find motor linkages from a 73 , 74 , early 75 model.---Should not be hard to find the correct lower unit.----Your location ?

Try to bring it home.------Fill it with sand for the kids or the cats !!

Yes the single lever control box can be used.----You also need to find the correct adapter ( for the lower cowling ) to install the shift cable.

The difference in compression is an ominous indicator of an issue in the cylinder.

Lots of room on the inside for hefty ( 3 layers ) structural repair.----Go 6" above and 6" below the cut.-----Cosmetic fix on the outside.------In rough water and waves you do not want any flexing there.

The shift handle and shaft have a detent.----This would be clearly felt when shifting this motor without lower unit attached.----With lower unit attached it might be a wee different.----Should not change by installing a new CORRECT o-ring.

Sorry-----But this is another example of why I try to refrain from giving advice on simple 12 volt parts and circuits.----It can be frustrating.------002 and 003 mean nothing !!

Interesting modification on cowling and latches.----Lower unit appears to have had a " nosecone " added.

What do you mean with 002 and 003 ???-----These are not electrical terms that mean anything to folks here.

Quick answer on an 8 year old post.-----Kill switch does both cylinders.----Start your own thread.

Rectifier has nothing to do with spark.----Battery is not involved with making spark.----Test this magneto before you install it on the motor.

Inspect fuel lift pump.