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    Johnson 4HP questions

    I'm glad I didn't go for 2HP then 😅
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    Johnson 4HP questions

    Thanks. I also found a large online which I've used and she seems to be starting and running quite nicely. I'm disappointed with the speed though. I'm only managing 5knts in my 8 foot fibreglass dinghy. Is that to be expected?
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    Johnson 4HP questions

    Thanks for the advice so far. I confirmed there was spark then took the carb off and cleaned it out, although it looked pretty clean. Put it back in and still couldn't get her to start in the bucket. I then used a drill on the flywheel and played with some of the settings and I got her started...
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    Johnson 4HP questions

    Hi all, Got myself a 4HP 2 stroke today, and an 8 foot fibreglass dinghy. I put the motor on and threw her in the water but she wouldn't start. However I didn't have any tools and it was getting dark so I'll start trouble shooting in a bin tomorrow. It hasn't run in 4 years but I'm told it...
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    Short vs Long Shaft for 4hp

    Hi all, I am looking for a Johnson 4hp to put on a small inflatable 4 person dinghy. I expect I need the short shaft version of the motor. When looking at used motors online how do I tell if its short or long shaft if the seller doesnt specify? Do they have different model numbers? Thanks
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    No sparking v4

    Thanks for all the replies everyone. I didn't know that there was such a tool for holding the flywheel, but after you told me I ordered one off Amazon. It will arrive this evening and I'll go and get it sorted. If it fails I'll try a screwdriver between starter and flywheel. I just calibrated...
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    No sparking v4

    Tried that originally, but couldn't find anywhere on the v4 to hold it while I applied 100ftlbs of torque. Anywhere I tried, like the lifting eye, it would lever it round.
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    No sparking v4

    Problem with a torque wrench is how do you stop the engine turning while torquing the flywheel?
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    No sparking v4

    It's a 1980. I think I found the problem. I was in a hurry the day I posted, hence the concise message. I ended up cutting the black and yellow wires to get the boat going so I could get home. Once I had time to investigate properly I found that the wiring loom under the flywheel had been...
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    No sparking v4

    Managed to get her started.... I first tried disconnecting the black and yellow wire from the ignition switch, no change. Then I cut the black and yellow wires off the blue power packs and she started up. I presume somehow somewhere those wires got earthed. I'll need to crimp on bullet...
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    Evinrude 120 v4 no spark

    How do you disconnect it? It's part of a multiplug?
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    No sparking v4

    Got a 100. Started fine, cut out. Now no spark. Where to look?
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    Starter Drive Assembly Failure Symptoms

    So I think this after market starter motor simply had the brackets welded in slightly the wrong place. I thought about cutting them off and rewelding but decided it would be easier to swap the internals of the new motor into the body of the old one. I cleaned out the old one with electrical...
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    Starter Drive Assembly Failure Symptoms

    New starter arrived today. I bolted it on and it turns well and the engine starts. I'm not sure if the fault in the old one is with the motor or the drive assembly, but I'll hang on to it anyway. One thing that concerns me is it feels like the teeth aren't fully engaged with the flywheel...
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    Starter Drive Assembly Failure Symptoms

    I jumped the battery with my truck which is starting fine and engine was running, but same thing. I also tried bypassing solenoid with jumpers and same. I see a few sparks from the gear on the starter when I'm trying to start it. I suspect it's a bit chewed up. I've ordered a new one...
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    Starter Drive Assembly Failure Symptoms

    Battery fully charged and engine turns by hand. How would I load test ?
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    Starter Drive Assembly Failure Symptoms

    Hi, I have a 1980 V4 with the American Bosch starter. https://www.boats.net/catalog/johnson/outboard/1980/100hp/j100trlcsc/electric-starter-solenoid-american-bosch-17916-20-m030sm The problem I am seeing is when I try to start the engine, the starter engages with the flywheel but then the...
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    Loss of power, won't plane

    I've been busy running in the boat this weekend and mostly its all positive. Had a weird problem today where the boat lost power and couldn't get up on plane properly. I pulled the cover off and the arm that connects to the ignition advance had popped out and fallen down. I put it back in but...
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    Loss of power, won't plane

    Thanks for the diagram, I was looking for it earlier but couldn't find it. At this stage I'm going to make so with the gasket as is for now. I really don't want to put more money and time into the motor yet, it's almost consumed me already. Plus I'm running out of summer here in Quebec and my...
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    Loss of power, won't plane

    Power head torqued down and now the water is flowing correctly. FML.... Not sure how I got the gasket the wrong way around. Thanks for everyone's patience and advice. I'll report back soon with the next problem 😁
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