<VV> 65 Monza 110hp engine question
patiomatt at aol.com
Mon Nov 20 22:41:58 EST 2017
The spark plugs were Autolite 425s that are only 1/2" reach, so I
changed them to Autolite 65s with the correct 3/4" reach and ... the
engine immediately had a knock. Removed the plugs and sure enough #6
and #1 had the ground electrode hit by the piston top. A couple of
others had the piston top kiss the cylindrical end part of the spark plug.
Larry!! you've been working on that 455 Olds too long!
425's / 1/2" is correct.... INLINE 230/250/292 use the 3/4 inch..
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