1979 20 HP Seahorse Water pump

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coleg

Recruit
Joined
Jun 24, 2011
Messages
3
Hi I have a 1979 20 HP Seahorse Model number 20CR79R SN 8054618 (possibly there is a C in front of the 8). A little history I have found out is that this is the same motor as a 1979 25 HP seahorse American model. this one was re branded for Canadian sale and I am told there is some change to bring it down 5 HP. The motor starts and runs fine. I used it last season and worked fine (great considering it was sitting for years before I got it) in the fall I drained the leg and refilled it for winter storage. I have pulled it out today and started it up ran fine took only a couple pulls. I do have a water muffler on it that clamps on to the leg where I assume it pulls water for the water pump. ( looking at the back of the engine...facing the prop.. it would be on the left hand side of the leg a small plate with three small holes held on by two screws when you take off the two screws its kind of a U shaped hole). From what I heard this engine does not pee water out to indicate that its pumping water to cool it down. So that brings me to my question... How do I know that it is working and can I test it before I take it out on the water this season?

Any help on this would be great and much appreciated THANK YOU!
 
T

tbfosback

Petty Officer 3rd Class
Joined
Mar 3, 2006
Messages
85
Re: 1979 20 HP Seahorse Water pump

Is the motor getting hot? You can always feel around the powerhead. Remeber a general rule of thumb is to replace your impeller every 2 years. If you can't remember when you replaced it, replace it.
 
C

coleg

Recruit
Joined
Jun 24, 2011
Messages
3
Re: 1979 20 HP Seahorse Water pump

Thanks, I have no idea when it was replaced as I bought it last year, used it for the year. changed the leg oil and parked it for winter.... so i do no know when anything other then spark plugs have been changed on it, which I changed last year before I took it out on the water. Is there anything else I should change, other then the impeller? And is there anywhere to find a guide or manual I am mechanically inclined but know very little when it comes to boat motors. Thanks
 
C

coleg

Recruit
Joined
Jun 24, 2011
Messages
3
Re: 1979 20 HP Seahorse Water pump

Ok so apparently I was wrong (really wish I had a manual for this motor) Where I thought it sucked water in, I was wrong. I stuck it in a barrel of water today and fired it up to make sure I was not missing something. and after about 30 seconds it starting peeing out the top and engine ran cool. I am sure it will still need a impeller change this season for sure. since I do not know when it was last done. Thanks for the info.
 
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