20hp 202hd outboard

[catfeet2]

"Sorry for asking a daft quest

"Sorry for asking a daft question, but could someone please tell me how a chrysler 20hp (model 202hd) is cooled? I have just purchased a very old but great running order outboard and boat for pennies and do not want to break the engine. it is a 2 stroke and strangly had two exhaust points one on the shaft and one at the bottom of the shaft above the propeller, (i thought the higher of the two would be the water outlet) if it is a water cooled engine then can someone please tell me how i can check if the water is doing the right path, and where the water gets sucked up and spat out! i can provide pictures and dont mind paying someone for there time. Also I think the engine is 1973-1976 thanks and hope someone can help. cheers Ash."

 

[galamb]

"Ashley, on age, my best guess

"Ashley, on age, my best guess would be 1972/73. The 202 models HA thru HG were in a series built between 1970 and 1975. So assuming the HA's were 70's they had 7 models built over 6 model years.

This motor is water cooled. There will be an impeller located in a housing at the top of the lower unit, powered by the driveshaft.

Andrew, who moderates this site most likely has impellers or kits for your particular model.

There will be a water intake that feeds the waterpump via a small tube. The impeller, being turned by the driveshaft will "suck" the water in and (pump) it up a "water tube" to the engine itself.

After circulating in the powerhead it will exit down the inside of the leg along with the engine exhaust.

Motors that do not have a tell-tale (an extra little hose to shoots a stream of water out the back of the motor to tell you that water is circulating), will usually have a relief hole part way down the leg. Some water will be spit out of it by the exhaust (or it may just kinda weep out) so that you can confirm water is circulating.

The majority of the (return) water and the exhaust will go out the exhaust hole. On later models that would come out of the center of the prop hub. On earlier models, such as yours, it was simply a hole near the propeller.

Since you have just acquired the motor you should at minimum, throw in some new spark plugs, change the impeller and lower gear oil and inspect all lines, hoses, wires etc and repair/replace any that are rotted, frayed, broken etc...."