power head swap & serial numbers

arkieguide

Recruit
Joined
Jan 19, 2016
Messages
1
I have an old 7.5 mercury, 2 cyc, tiller, manual start. No where can I find a group of 7 or 8 numbers ??? The cover is black, with 2 tone stripes , mercury 7.5 in white. On the block at the spark plus end is comet lightning - below that on freeze plug is A706 646 - same side close to head is very small print 37-7692. opposite side of block on head flange is 111 365. I have the block out and the crank and pistons out, wire brushed the block no more numbers. I need to find out the serial number - want to put a 9.8 head in place of the 7.5.
Thanks a lot guys.
 

racerone

Supreme Mariner
Joined
Dec 28, 2013
Messages
36,044
A 9.8 block will bolt right on.--------Post picture of the cowling to identify year.
 
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