Help! I have a beautiful/pristine J10RCCD that runs better than any 2-stroke I've ever owned, here's the catch, up to about 30-40% load. It idles better than some 4-strokes! BUT If given full throttle it will shoot right out great and then within 1-1.5 seconds drops back to what feels like a lean misfire. If I keep it there at WOT, after 5-7 seconds it will pick up and GO! But only for a second, then goes into a FULL - NOTHING -FULL - NOTHING thrashing. If I madly pump the ball I can intermittently get it to stay up at full power. My obvious first thought - lean. Went though carb - same result - went through carb again - same result. Replaced the fuel pump - same result - swapped fuel tanks -same result - checked the hoses/fittings all the way through - found no issues. With help of friend with outboard "addiction" - swapped coils - wires - power pack - same result. At this point I'm questioning vacuum - could it be leaking at the upper/lower crank seals? I also question the reeds. Could they cause this type of symptom?
Yes - I've kind-of backed it up to the parts dept but clearly failed. Ideas? STUMPED
Yes - I've kind-of backed it up to the parts dept but clearly failed. Ideas? STUMPED