My engine developes a "rattle" and looses rpms when held at 2000 under muffs, its sounds like a tappet rattle but the noise is only present once revs are increased! The noise seems to be comming from No 2 or 4 cyl area,I have checked valve clearances and adjusted to the manual.Engine was rebuilt about 30hrs ago, the plugs are new and new fuel filters.I had the carb rebuilt recently.Is it possible that a valve spring is failing?Any ideas would be appreciated
Looks like I may have solved it. I changed the plug with a new 1 and replaced the lead, noise has now gone and I assume it was a faulty new plug or the lead which were silicon,not wire
Looks like I may have solved it. I changed the plug with a new 1 and replaced the lead, noise has now gone and I assume it was a faulty new plug or the lead which were silicon,not wire
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