powderfinger 24 #1 Posted August 15, 2016 I have specific symptoms....need help. after the engine warmed up for 10 mins or so, after a few stop/starts, I throttled up and it cut out. quickly dropping back to idle, it would run slowly fwd in any gear. if I throttled up it would cut out. Diagnosis please? btw have used seafoam in the fuel for a few tanks of gas...... thanks Share this post Link to post Share on other sites
608KEB 796 #2 Posted August 15, 2016 Your fuel tank could be airlocked. Try cracking the cap. That happened to a B-100 I have. Share this post Link to post Share on other sites
KC9KAS 4,744 #3 Posted August 15, 2016 Due to the use of the Seafoam, you probably "cleaned" out the fuel tank, fuel line and other crap in the carb and it is clogging the main jet. Seafoam works really good, but unless all the crap gets sucked into the combustion chamber and burnt up, you sometimes have to clean up the carb! 2 Share this post Link to post Share on other sites
953 nut 60,160 #4 Posted August 15, 2016 Have you changed out the air filter, points, condenser and spark plug? Any of these can have a drastic effect on an engine's performance. Share this post Link to post Share on other sites
slammer302 2,156 #5 Posted August 15, 2016 You may try to choke the engine when it's not running right if it helps it run better then you will know that the engine is starving for fuel. Ie carb or fuel delivery problem Share this post Link to post Share on other sites
Achto 29,408 #6 Posted August 15, 2016 Just had this problem with my 1076. After trying numerous things with the fuel system it ended up being the condenser. Changed that & life was good again. 2 Share this post Link to post Share on other sites
powderfinger 24 #7 Posted August 17, 2016 (edited) UPDATE: the Koehler starts right up once it cools and will run on full throttle. Does this help eliminate any of the possible causes you have put forth? Edited August 18, 2016 by powderfinger Share this post Link to post Share on other sites
953 nut 60,160 #8 Posted August 18, 2016 Coils and condensers can be temperature sensitive. when you shut down the engine while it is hot remove the condenser wire that connects to the "-" terminal of the coil and see if it will start; if it starts the condenser was probably the problem. An engine will run without a condenser but it is not good for the points. Don't continue to run it without a condenser. 48 minutes ago, powderfinger said: starts right up once it cools. What did you change to achieve this improvement? Share this post Link to post Share on other sites
powderfinger 24 #9 Posted August 18, 2016 9 hours ago, 953 nut said: Coils and condensers can be temperature sensitive. when you shut down the engine while it is hot remove the condenser wire that connects to the "-" terminal of the coil and see if it will start; if it starts the condenser was probably the problem. An engine will run without a condenser but it is not good for the points. Don't continue to run it without a condenser. What did you change to achieve this improvement? my apologies. to add that its not only starting up after being cold, but it will run at full throttle. that was my original issue. once it runs and warms up,it occasionally will cut out as I throttle up. if I quickly throttle down, it runs...... sorry for lack of clarity. perhaps I should run for public office.....lol 1 Share this post Link to post Share on other sites
953 nut 60,160 #10 Posted August 18, 2016 14 minutes ago, powderfinger said: sorry for lack of clarity. perhaps I should run for public office. Let me clarify my ambiguous statement which was intended to mislead you! I am running for public office because my checkered past would prevent me from getting a real job. 5 Share this post Link to post Share on other sites
