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How old is my Mercury Tunerbolt 7.5 hp sn 3016729
The Thunderbolt ignition is a 12 volt system.
Serial number 1999327
The correct maker point gap setting on the 1972 model, 20 hp Mercury outboard is .020in.
The in-line 4 cylinder, 50 hp Mercury outboard requires a 50:1 ratio, one pint of 2 cycle oil, to six gallons of fuel.
Thank you for your reply, the HP is 7.6 Mercury Thunderbolt In order to determine the year model for a Mercury outboard, in addition to the serial number, the engine horsepower is needed as well.
An 85 hp Mercury outboard, serial number 3858432, would be a 1973 year model.
50:1
i have a 7.5 merc outboard ser.no.7678203 what jear is it vern o.
In addition to the serial number, the horsepower rating is needed to determine the year model.
Merc 850 854590512 thru 4831998 1977
visit on the web oldmercs.comselect the model guide.you can identify the year up to 1985 from this list