Re: Oil spots on air filter

You're right. So long as neither the IP shaft or the crankshaft was 
moved the basic timing was preserved.

Now, did you reinstall the IP exactly as it came out (using scribed 
marks on its slotted mounts)? If not, then the injection timing is 
somewhat "off"; by your description it's probably a bit too advanced.

You could retard the injection a bit to see if you note any difference. 
A retarded engine starts easier, is quieter but, if way too retarded, 
will lack power.
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