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    Cooling Problems

    Hey Guys. I bought a 1974 25hp last year for cheap and only had it out once and it started to get really hot and barely spit any water out of the telltale so i instantly shut it off. I looked at it a few weeks back and noticed that the thermostat was stuck shut so i swapped it out with a working...
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    1974 25 Johnson dying

    Hello, I ran my motor yesterday and the water coming out was hotter than I thought it should be. Could hold my hand under it for a few seconds but was definitely warm. Once the motor ran for a while I went down to a slow idle where the motor eventually died. After this I was not able to start it...
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    Breaking in my motor

    Hello everyone. I finished my rebuild and I am just wondering what steps to take for breakin it in. My motor is a 1977 johnson 25 hp. In my manual it says run for 20 hours at varied speeds. Is that all I need to do or is there anything else to look into? Also, should I keep the 50:1 oil ratio...
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    1977 johnson 25hp

    Hey guys, I just completed my rebuild on my 1977 johnson 25 hp. I ran it for the first time today and was just wondering if I could get some opinions on how it sounds. the video it fairly short but any help is appreciated. I got the cylinders bored out and new oversized pistons put in. All new...
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    1977 25hp Johnson Opinions

    Hello Everyone. I have a 1977 25hp Johnson. 25RL77H. It overheated a few times a couple years ago and now its time to try and fix it. We checked the compression and i believe were getting around 50-60. Once we took it all apart we saw that the head gasket was blown and a couple others were in...
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    spinning prop

    I have a 1977 25hp johnson tiller. I just took apart the leg today.. and when i put it back together and tried to pull start it in neutral the prop was spinning. And then when it was in forward and i pulled the prop didnt spin. Would this be from me hooking up the shifting rod wrong? or did i do...
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