first off, I want to say this forum is awesome. I've been tinkering with 1960-1970 era evinrudes/Johnson motors for a few years when I had 2 9.5 sportwins given to me and they run awesome now. Everything k needed was on this forum.
So now to the problem im having. I picked up a 1969 evinrude 25HP the other day in hopes of getting a bit more power on my 14 foot tinny. The seller said he had replaced the shifting fork (clutch dog??). Nothing else had been done.
I replaced the points and condensers, coils look good and I get a nice spark. I put in some C6J plugs and the motor fired right up in the barrel, ran good and revved up nicely. The thermostat was sticking aswell so I replaced that too.
I took the motor out today for its maiden voyage and once again it fired right up, went nice and fast just like I wanted and then BOOM it felt like I hit a rock or log, slowed the boat down and check it out, nothing wrong at all. So here I go again and it happens several times, maybe once every 200 yards.
I've read online a bit and I'm thinking it's either a "lean hiccup" or it's popping out of gear, the engine doesn't rev up at all when this happens and it continues to fly along no problems except this one issue.
I took a short video of the motor running in a barrel, this is with new fuel 50:1. To me the plugs look dry as they are a light brown color in both cylinders. .020 gap on the points and .030 on the plugs.
http://youtu.be/EWC4-_IMoms
The video isn't very good, but the motor is in gear and I'm giving it a bit of throttle. In the video it sounds like it clicks but it's more of a cough. When I'm on the river at a higher speed it's worse. The whole motor will shake as if it hit a log and return to normal. There's no feedback in the shifting lever either.
Anyways I'm looking for opinions before I dig into this deeper. If anyone needs more info just let me know. I may go out and take a better video tomorrow on the water.
So now to the problem im having. I picked up a 1969 evinrude 25HP the other day in hopes of getting a bit more power on my 14 foot tinny. The seller said he had replaced the shifting fork (clutch dog??). Nothing else had been done.
I replaced the points and condensers, coils look good and I get a nice spark. I put in some C6J plugs and the motor fired right up in the barrel, ran good and revved up nicely. The thermostat was sticking aswell so I replaced that too.
I took the motor out today for its maiden voyage and once again it fired right up, went nice and fast just like I wanted and then BOOM it felt like I hit a rock or log, slowed the boat down and check it out, nothing wrong at all. So here I go again and it happens several times, maybe once every 200 yards.
I've read online a bit and I'm thinking it's either a "lean hiccup" or it's popping out of gear, the engine doesn't rev up at all when this happens and it continues to fly along no problems except this one issue.
I took a short video of the motor running in a barrel, this is with new fuel 50:1. To me the plugs look dry as they are a light brown color in both cylinders. .020 gap on the points and .030 on the plugs.
http://youtu.be/EWC4-_IMoms
The video isn't very good, but the motor is in gear and I'm giving it a bit of throttle. In the video it sounds like it clicks but it's more of a cough. When I'm on the river at a higher speed it's worse. The whole motor will shake as if it hit a log and return to normal. There's no feedback in the shifting lever either.
Anyways I'm looking for opinions before I dig into this deeper. If anyone needs more info just let me know. I may go out and take a better video tomorrow on the water.