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1988 Johnson 40 lower crankshaft seal

jdrake83

Member
Motor bogs down at WOT. Struggles to get to top speed of 20mph (was 9mph until I found bad reeds and put a new set on).

Both cylinders get 130psi

Motor overheated last summer due to head gasket failure and a piece fell and blocked the cooling water.

Motor has all new ignition components (coil, power pack, stator, etc)

Carbs rebuilt.

Fuel pump rebuilt (found bad “wheel” gasket)

Unburnt fuel and otherwise brownish gunk leaks down the front of the midsection.

Someone suggested bad crankshaft seals. Just had the flywheel off and didn’t notice any mess up there so I’m wondering about the lower…

Given the overheat is this “it”?

Thanks for the help
 
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