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Mercury 1991 75 Merc ser# 7156471 Need Info also its on a 1990 Malibu 185 57 litre Cobra Omc with Cuddy Cabin Any Advice on oboard to inboard steerin

  • Thread starter "Skidooeo, Jeff in B.C"
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"Skidooeo, Jeff in B.C"

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" so stoked, I just upgraded m

" so stoked, I just upgraded my kicker motor from a 3/4 full open 4 horse 1969 thunderbolt igniton which recently wont run,but has well served itsd days, gonna need info on that too if any advice, its not seized, just wont run, new plug i got, found gooddeal on what looks like a 1991 mercury as its hood is dark and light blue stripe with silver mercury writing, serial # 7156471 people sayin 50:1 for mix but the 69 4 horse i got likes 20:1,also iam usin it for trolling at idle speeds mostly, so prob 32:1 is decent? i have no info on anything for my new Motor, i run it on a 1990 malibu 185 with a 5.7 litre cobra v.8 with a omc prop so any info on thats cool too, thanx, "
 
Skidooeo...Your 7.5hp is prob

Skidooeo...Your 7.5hp is probably a 1981. At best is an 83. It ls a 50;1 mix and if you idle alot at 32;1 your going to load up the motor and keep fouling plugs.
 
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