Hi all, fairly new to all of this and wondering if someone could give an opinion on what to do.
Right, so we have a 50hp Johnson. Recently replaced the kill switch circuit (because someone had cut it out meaning that even removing the key from the ignition didn't stop it). It hadn't been run for 18 months or so. Took it out for the first time the other day on an 18ft dory. It revved up fine in foreward and got on the plain and was going very very nicely for half the day! In reverse it was hitting a good rate of rpm aswell. For the second half of the day, we turned the engine on and suddenly it would rev about halfway (not get on the plain, only do 8 knots or so) and the engine sounded all bogged down. The revs would flutter up and down on their own. In reverse, it revved high as before in the same was as it used to rev in foreward. Now I would accept answers of load and prop normally but it was plaining at high revs and now it only Boggs down and sounds like the engine is being overloaded with fuel. When it isn't in gear it revs all the way up as it should too. I took the boat out a few days later and exactly the same thing happened. Reverse still going strong though!
It is a two stroke with model no: J50BEL CNR
I was thinking it may need spark plugs as when more fuel goes in it may not be burning and getting bogged?
Many thanks to all who reply and can help!
Right, so we have a 50hp Johnson. Recently replaced the kill switch circuit (because someone had cut it out meaning that even removing the key from the ignition didn't stop it). It hadn't been run for 18 months or so. Took it out for the first time the other day on an 18ft dory. It revved up fine in foreward and got on the plain and was going very very nicely for half the day! In reverse it was hitting a good rate of rpm aswell. For the second half of the day, we turned the engine on and suddenly it would rev about halfway (not get on the plain, only do 8 knots or so) and the engine sounded all bogged down. The revs would flutter up and down on their own. In reverse, it revved high as before in the same was as it used to rev in foreward. Now I would accept answers of load and prop normally but it was plaining at high revs and now it only Boggs down and sounds like the engine is being overloaded with fuel. When it isn't in gear it revs all the way up as it should too. I took the boat out a few days later and exactly the same thing happened. Reverse still going strong though!
It is a two stroke with model no: J50BEL CNR
I was thinking it may need spark plugs as when more fuel goes in it may not be burning and getting bogged?
Many thanks to all who reply and can help!
