mercury thunderbolt 500

fuzzyzuk

Cadet
Joined
Apr 25, 2011
Messages
29
i think im having some bad timing problems maybe the belt skipped?
when spark plug wires are in correct order it wont fire
when i change them all up it will fire and sometimes run even for an hour but really bad
does anybody know the procedure to check timing
and replace the belt and reset the timing?
its a mercury thunderbolt 500 50 hp i belive its a 1970
the s/n is 2630467
 

Laddies

Banned
Joined
Sep 10, 2004
Messages
12,218
Re: mercury thunderbolt 500

I have PMed you the sheet for70 to 75 500 engines hope it helps
 

smitrone

Recruit
Joined
Sep 17, 2010
Messages
1
Re: mercury thunderbolt 500

please help. I need info on how to adjust timing on my thunderbolt 500 as well as how tight should the belt be and how to replace it if necessary.:confused::confused:
 
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