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    Slipping 1978 115 hp Johnson

    Hi all, I have a 1978 115 hp Johnson that seems to slip under load (towing - I can't think of the "C" word for the process.) and you have to drop off the revs to pick up speed. Anyway the engine seems to run fine but at WOT it is doing roughly 80 km (50mph) at 6500 rpm. This is to high rpm isn't...
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    Trim Stopper

    Hi all, Sorry about this stupid question but I'm new to this game. I also hope this is the right section for the question? Anyway here I go. I assume that the round bar that goes through the bracket (there are about 5 holes to choose from in a slight semi-circle) parallel to the transom is used...
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    Timing 1978 115 hp Johnson

    I know this is probably way up the garden path. I checked the timing whilst the engine was running at 1500 rpm idel speed. #1 cylinder and the timing was 180 degrees out. Is this because there was no load on it? Or is it really 180 degrees out. I wouldn't have thought the motor would run with...
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    Engine Serial Number 1978 115hp Johnson

    Hi all, Probably a stupid question but can anyone tell me where the Engine Number is on a '78 115 hp Johnson. Is it the one that is on the tag (with the model number) attached to the mounting bracket or is it on the the hoist ring/clip at the top of the engine (but this just might be a part...
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    1978 Johnson 115 hp Backfires on idle and at high revs.

    Hi all. Bit of a newbie so bare with me. I bought this old boat that hadn't been started for 18months but supposedly ran well. Anyway the only way I can get it started is to use "Starter Spray". The only problem is that it backfires at idle and is really bad at high revs. There is a sweet spot...
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