Re: Trouble getting on plane
Be very carful using anything but the octane that the motor was made for. 87 in this case. If you go higher, consider going richer on the carbs to compensate.<br /><br />With the top rpm at 5000-5400 youre lugging the motor now. That alone raises combustion temps. Youre running a fairly cool plug which is good. Just be careful with octane higher than 87.