Originally Posted by VETE76
my friends rv7 w/lyc io360was very hard starting. we had a tech counsler come over and he asked to see the engine ground strap. so we took the cowl off and showed him. he asked us to unbolt it, we did, he looked at he place we bolted the wire to, he asked whats all this engine paint doing here? remove it. we did. engine spun over much much faster and started right away. never a problem again! food for thought.
This could have been worse, and I had it happen, on the first few attempts to start my O-360. Actually fried a wire to the ignition switch. The engine barely turned over with the plugs installed, but had turned easily on the test with plugs out of the top. After a 2nd or 3rd attempt I smelled a hot wire, saw the Tefzel deformed, and felt the heat to be sure my eyes were seeing the problem.
Due to a distraction, I'd laid the ground strap on the bench one day and never connected it to the engine or the firewall. An ignition switch lead had become the only "ground wire" because it was the only path. Replaced the lead, installed a ground strap, and cautiously tried the starter ... ZING, sounded good.
It has given me cautionary approach to starting the engine. If ever it fails to turn over well, I will check the battery voltage 1st and the ground strap continuity 2nd, before cranking away at a crawl.
RV-6A QB Tip-Up, 1st Flight 3/18/17
O-360-J2A (modified & F/I), Sensenich FP (cruise)
VP-X Sport, Dynon SkyView, VFR day
(FFZ) Mesa, AZ - N234GB -