snowhound 103 #1 Posted August 20, 2014 I have a 1980 C-105 with an engine issue that I need help with, after running for about 20 min the engine dies if I'm quick enough and pull the choke out about 1/4 inch it will continue running fine. I've replaced points (they were pitted), fuel filter, cleaned and adjusted carb. I've though about the coil or condenser breaking down after heating up but wanted to get some advice from members before going any further. Ed Share this post Link to post Share on other sites
shallowwatersailor 3,213 #2 Posted August 20, 2014 A possibility could be the throttle shaft sleeve. Check to see if you can wiggle it. If it is, a temporary solution is to wrap nylon string around it to act as a "gasket" to close the gap. The engine is sucking too much air and that is why the choke going partially close helps. Share this post Link to post Share on other sites
Ed Kennell 35,897 #3 Posted August 20, 2014 If choke helps, must be starving for fuel. Remove the fuel line at the carb, hold it in a can and crank engine. You should have a good pulsing spurt. Or you have an air leak. Check bolts and gasket between carb and block and loose fitting throttle shaft. Sorry John, I was typing when you posted. Share this post Link to post Share on other sites
snowhound 103 #4 Posted August 20, 2014 Thanks for the quick replies, I'll check fuel pump and for an air leak today Ed Share this post Link to post Share on other sites
can whlvr 991 #5 Posted August 20, 2014 make sure the fuel cap vent isn't plugged Share this post Link to post Share on other sites
Molon_Labe 731 #6 Posted August 20, 2014 You can drain the gas tank and pull the fuel shut-off valve out of the grommet and see if the inlet is plugged. If you have a see through fuel filter and it's dry, check upstream, toward the tank. I just had the same problem on my C-111 and it was blockage at the inlet to the shut-off valve.. Share this post Link to post Share on other sites
