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How are small Chrysler 4 HP engines cooled

R

roopzz

New member
just wondered if someone could

just wondered if someone could tell me how the cooling system works in a 2 stroke outboard?

thanks
 
"In a water-cooled engine, coo

"In a water-cooled engine, cooling is provided by a (water pump).

In the lower unit there is an "impeller" either around the drive shaft or the prop shaft that forces water out of it's housing up a water tube to the water jacket and channels surrounding the cylinders.

The water exits down the exhaust housing, thus providing two addition functions after it has cooled the power head - it also cools the exhaust to some extent and acts as a muffler to keep some of the noise down...."
 
I have a 9.9 sea king and was

I have a 9.9 sea king and was wondering if the engine needs to be in gear in order for the impeller to circulate water?
 
"I believe some of the older C

"I believe some of the older Chrysler one-lungers had air-cooled cylinders. If so, the water pump only cools the exhaust leg, and the cylinder block will have fins on it and the flywheel will have fan fins."
 
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