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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

    Re: 1977 johnson 25hp Okay thanks guys, I will make sure to use a bigger bucket next time and put in in deeper. Here is a pic of the thermometer, pretty sure it is seized but thought i might as well post a picture just to make sure. The model number of the motor is 25rl77h
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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

    Re: 1977 25hp Johnson Opinions Here are the pictures of the cylinders and pistons. Your fingernails do not get caught on the groves in the cylinder but you can notice its not smooth. Same thing with the pistons. The rings do not appear to really have any scoring on them. But I am not expert...
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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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