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    1970 25hp Johnson lower paint question?

    Hello, I just picked up my second 25hp Johnson , a 1970 for 150$. I bought it to use as a parts motor for my 1971 25hp Johnson but it’s so clean and runs good I’m stuck with the issue of having two great motors. I’ve apparently caught the itch to work on these older motors. I Changed the gear...
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    Wiring bow trolling motor on 13’ aluminum V

    Thanks. I’ll probably look into a flexible conduit or PVC. I appreciate the responses
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    Wiring bow trolling motor on 13’ aluminum V

    Hello, I just installed a new bow mounted trolling motor(older minn kota 50lb powerdrive) on my 13’ Gregor aluminum boat. Per Minn Kota’s recommendation I’m going to use 4awg wire(not marine grade only standard insulated-copper) to run power from my battery at the stern to the motor on the...
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    1971 25hp Johnson running rich

    Well we cleaned the exhaust cover divider plate /new seal and cleaned/rebuilt the carb again. Lots of old carbon in the exhaust cover water passages that was cleaned out. Cleaned out the crankcase drain circuit and made sure everything was not plugged up. When we pulled the crankcase bypass...
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    1971 25hp Johnson running rich

    Thanks I’ll search through his posts. I’ve read a lot of good info on his posts related to other topics. Thanks for the info.
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    1971 25hp Johnson running rich

    Thanks! I’ll check the parts you recommended. I know the only hosed I haven’t replaced are the crankcase hose you recommended I check . I’ll check those areas and see if that helps. 👍🏻
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    1971 25hp Johnson running rich

    I’ll try to tune it with the JC6 but figured the hotter plugs may not foul as quick. I also read somewhere that well used motors may run better with JC8s . I’ll throw the JC6s in and try to tune it with them
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    1971 25hp Johnson running rich

    It’s been few months since I checked the compression but I recall it was within specs and somewhere around 110 on each Thanks for the input. We will plan to inspect the exhaust cover divider plate. I checked the compression few months ago and I recall it was around 110 on one and 112 or so on...
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    1971 25hp Johnson running rich

    I recently replaced the fuel pump with the OMC pump . Good to know about the sludge in a barrel. I’ll try taking it out and running the heck out of it and see what happens.
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    1971 25hp Johnson running rich

    Hello all, I have been working on my old 1971 25hp Johnson. I have replaced various parts with OMC replacement parts but my issue is the outboard still runs way too rich. I get a lot of sludge in the barrel and some loss of power. My mechanic thinks it may be a hole in the water jacket or...
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    Orfice plug/high speed jet 72 vs 72d?

    Thanks
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    Orfice plug/high speed jet 72 vs 72d?

    Hello, I have a 1971 25hp Johnson and recently purchased a new high speed jet/ orfice plug for the carb. I broke the old one trying to tighten it. ...Yeah I know.. Anyway, the replacement part is stamped 72d the original was stamped 72. I’m assuming these are the same. They look like the same...
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    71 25hp Johnson running hot?

    Well I tested the temp in the bucket and the left side(non exhaust cover side) ran up to 140F then after few min dropped to 130-135. In guessing it’s running at normal temps. The exhaust side ran a bit cooler. I flushed water through both holes in the thermostat housing and saw water running out...
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    71 25hp Johnson running hot?

    I’ll try blowing compressed air through the thermostat route. It does not have a rubber plug but good idea to check that. also, I checked the compression and I have just over 115lbs on top #1 cylinder and 120ish on number 2. Is that good? also, I borrowed a temperature laser gauge and will...
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    71 25hp Johnson running hot?

    The test bucket is plenty deep and also noticed it was real hot to touch when I was running it in the lake. I had a shop do the impeller few months ago but I did all the electrical/ignition work. Looks like I may need to check the shop’s work and learn to do the impeller. Is there a way to...
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    71 25hp Johnson running hot?

    Hello, I have a 1971 25hp Johnson. I replaced the thermostat and a bunch of other parts including ignition components, rebuilt the carb, new impeller, gear oil etc. I noticed after running it, one side of the cylinder/ crankcase gets real hot. Almost to hot to touch. If facing the motor where...
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    1971 25hp run J4J Champion? Or ....

    Great thanks. I’ll throw in a set of J4C’s and tune it up.
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    1971 25hp run J4J Champion? Or ....

    Oops. I meant to write I found J4C’s for sale. I was considering ordering those in place if the J8C’s I’ve been running. I guess J4J’s have been discontinued. The service am manual calls for J4J’s. thanks
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    1971 25hp run J4J Champion? Or ....

    Hello, forgive me for asking a question that I’m sure this has gotten some discussion in the past. It seems like my web searches have turned up a variety of different opinions. Well, I’m hoping to get some advice from folks that have had real life experience running a similar motor than mine. I...
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    Flush cooling system 71 25hp Johnson?

    It does not have a flushing port that I know of. It’s only being used in fresh water but I know the previous owner used it in salt occasionally. I’ve owned it less than a year. I will run it in a bucket with the thermostat out then reinstall . Thanks for the response.
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