Have recently got a JAP 2a attached to an Alcon pump. Some may be aware of this from replies in a previous forum string. But wish to start a new subject on the engine and not the pump.
The exhaust valve was stuck open and managed to tap it closed through the plug hole. But still no compression, I think the engine has not fired in decades, so am going to take the head off to see if the rings are stuck. Or it’s something else.
There was no spark and a quick resistance test from the HT lead to ground raised the possibility of a breakdown in the secondary coil windings. Cleaned and adjusted the points through flywheel access hole, still no joy, but this was anticipated. Which brings me to the reason of this post. I need to take the flywheel off and have not done this on a 2a before. Am I correct in assuming that the roll pin behind the starter pulley needs to be knocked out and then I can fit a puller to get it off. Then I need to lock the engine to undo the large slotted bolt, it is a right hand thread. Lastly and most importantly, do I need to make a puller so I can use the 3 bolts in the flywheel to get it off. Or can I use the method I do for Briggs & Stratton’s, a lever behind the flywheel and the point of an air chisel on the crankshaft centre. A bit of pressure on the lever and pull the trigger. Or is there another way.
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