halmc
Petty Officer 1st Class
- Joined
- Feb 27, 2008
- Messages
- 231
A little 1965 Evinrude Light Twin is haunting me. This little motor belongs to a friend. It lay in storage for a couple of years (how many tales start like that) so w/o trying to start it, I removed the Carb, cleaned it in carb cleaner, took the foot off, made sure the water pump impeller was at least servicable, and put it on the back of a boat. It went very nicely -- for about two weeks.
It has me baffled at the moment. It starts almost every time on the first pull, but must be almost immediately throttled up. After a few seconds at full rpm, the rpm begins to decay, but a quick pull and release on the choke will buzz it up again. That little scenario repeats itself as many times as you have time to do it. The idle jet (which one can adjust from the front) has essentially no effect. If you don't give it a bit of a choke, it will die.
During the two weeks of running nicely, it didn't idle particularly well, but the idle jet did have some effect, tho somewhat less than one would like. I guess that the high speed jet is fixed on this motor(?)
I have since had the carb off, recleaned it being careful to ensure compressed air would pass through all of its little passages.
The ignition seems faultless. It starts essentially everytime I pull the cord.
Lastly, I'm suspicious, having read another Light Twin thread that the engine may be lacking some sort of packing around the low speed jet needle shaft.
Any suggestions appreciated.
It has me baffled at the moment. It starts almost every time on the first pull, but must be almost immediately throttled up. After a few seconds at full rpm, the rpm begins to decay, but a quick pull and release on the choke will buzz it up again. That little scenario repeats itself as many times as you have time to do it. The idle jet (which one can adjust from the front) has essentially no effect. If you don't give it a bit of a choke, it will die.
During the two weeks of running nicely, it didn't idle particularly well, but the idle jet did have some effect, tho somewhat less than one would like. I guess that the high speed jet is fixed on this motor(?)
I have since had the carb off, recleaned it being careful to ensure compressed air would pass through all of its little passages.
The ignition seems faultless. It starts essentially everytime I pull the cord.
Lastly, I'm suspicious, having read another Light Twin thread that the engine may be lacking some sort of packing around the low speed jet needle shaft.
Any suggestions appreciated.
