Correction

In our September issue, there were a few typos that reader Walt Moore pointed out in our article “How to Break In Your Engine.” In the “Engine Operation” section, it should read “the engine makes one revolution for every power cycle,” not two. Also, in the “Engine Terminology” section, it should state that the wristpin connects the piston to the crankshaft, not the crankcase. Finally, Walt points out that for ABC engines, the main needle valve should not be opened four turns (which is OK for ringed engines). ABC engines need heat early on in the break-in process to open up the tapered cylinder walls and make them more parallel. Very rich settings provide cooling, such that the cylinder walls don’t wear in properly, remaining tapered. We agree. And with all things important, as with engine break-in, always read the manufacturer’s instructions.—GY