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  1. R

    3.7 gets hot while idling

    It has a 4 " heat exchanger
  2. R

    3.7 gets hot while idling

    Finally got the video. Lol. Of course with help from my son. I'm hoping it's just a impeller that it needs. Next year I will change the impeller and check for clogged tunes in the heat exchanger. Notice where the pink antifreeze comes from.
  3. R

    3.7 gets hot while idling

    Outlive and motor serial
  4. R

    3.7 gets hot while idling

    The exhaust bellows were changed according to the previous owner who is a friend of mine so I trust him. Impeller was not changed. Unfortunately I'm having a hard time sending the video. Keeps telling me the files don't have a allowed extension. The pics show where the water is coming from...
  5. R

    3.7 gets hot while idling

  6. R

    3.7 gets hot while idling

    Can't seem to send the video. Water was coming out just above the gear housing and some from the transom. It's a Alpha 1 out drive
  7. R

    3.7 gets hot while idling

    Sorry about the late reply. It's a 89 3.7l. Alpha 1 out drive. 4 " heat exchanger. Son took a small video as I was running rv antifreeze trough it. (Overkill I know).
  8. R

    3.7 gets hot while idling

    Sorry for late reply. I ran rv antifreeze (over kill) through it today. Was expecting to see antifreeze coming from the transom area but it was coming out the gear housing. Got my son to video a few seconds of it running. Not sure if that's sufficient flow.
  9. R

    Winterizing 3.7l mcm 224 165 hp mercruiser

    Thanks guys. Sounds too easy. So there is NO water going to the engine and head? Just antifreeze? No block to drain? Seen a flow diagram for a 3 litre but not for a 3.7 closed system. Would have a peace of mind then. Thanks again.
  10. R

    Winterizing 3.7l mcm 224 165 hp mercruiser

    Hey there. My son recently bought a boat with a engine model # mcm 3.7l 224 165hp mercruiser. It's called a closed system by reading some threads. I can't seem to find the same motor on you tube to winterize this motor with peace of mind not cracking anything on the motor. Does anyone have any...
  11. R

    3.7 gets hot while idling

    Not sure. New one was installed before buying the boat. Runs cool. 160 when moving
  12. R

    3.7 gets hot while idling

    Was out with my sons today in his boat with the 3.7 mercruiser. He bought of a buddy of mine who took good care of it. Changed impeller last year. It gets up in temp if you idle for too long. Today the water temp was 65 degrees. The engine was running warm. Then noticed she got up to 200 after...
  13. R

    Commercial Johnson 10hp

    Strathroy is where i live. In-between Sarnia and london. 402 is a stones throw north.Thanks. Runs great. Water flows good out of pee tube. Held hand on heads while running in a bucket and barely warm.Just wanted to replace impeller or have backup and dont want to guess on plugs.
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    Commercial Johnson 10hp

    I live in Ontario Canada. I've known about this motor for 30+yrs and it on a 14ft boat with a steering wheel. Back then always known as a commercial. I doesn't look like it was ever torn apart.According to the Johnson publisher Ken Cook Company,it is a commercial 83 10hp. You can still get shop...
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    Commercial Johnson 10hp

    So I acquired a 1983 Johnson 10hp commercial. Model J10RSM. I have had no luck finding this model to acquire parts like impeller and prop seals. I did however find a parts catalogue and service manual from a original publishing house but way overpriced. 100$ for manual and 50$ for a parts...
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