Quote:
Originally Posted by quattrodave
Not sure about the NG engine but on my 7A there are 2 marks on the flywheel a 0 for TDC and a 12 for BTDC (TDC = top dead centre, BTDC = before top dead centre) the engine should be timed with a strobe to the BTDC mark, effectively firing 12 degrees before it gets to TDC (on the 7A) thats why when you move your distributor about 10mm it runs better as you are getting closer to the correct BTDC setting.
If you locate the 0 mark in the transmission housing try moving the engine a few mm anticlockwise using the front crankshaft bolt to locate the other BTDC mark which sounds like its a 15 on your engine not a 12 as on my 7A.
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Solved by the sound of it, good stuff.