74 merc 850 with no spark

sam1995

Recruit
Joined
Mar 17, 2009
Messages
1
I have a 74 merc 850. It wont spark most of the time, but if i check the switchbox and put it all back together It usually fires right up.
 

bullbat

Petty Officer 2nd Class
Joined
Mar 10, 2009
Messages
152
Re: 74 merc 850 with no spark

sounds like you have a bad wire somewhere i would start checking wires one by one and see what happens
 

erniex

Petty Officer 3rd Class
Joined
May 26, 2004
Messages
93
Re: 74 merc 850 with no spark

The wires on the old Mercs are notorious for deteriorating. The insulation crumbles and the wires corode inside. I'd do as bullbat says and check your wiring and connections.

EE
 
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