Basic questions about Mercury motors...

Felder

Recruit
Joined
Jun 9, 2007
Messages
1
...from one who knows nothing.

Actually, I know quite a bit about automotive diesel and gas engines. I have never messed with a boat engine until my dad died this spring, leaving the family with a totally disassembled 20 foot Lowe pontoon boat with a 40 horse Merc from 1996.

I've done pretty well getting the bits and pieces of the boat back together. But now comes the hard part--the controls and motor.

I have a few specific questions.

Where do the battery wires, the ones that power the starter, connect to the engine?

I was missing the key, and had one made. I understand that there should have been a key code on the switch in the control housing, but it was missing so I just went to a locksmith. However, I think he didn't do a very good job. I have to push the key in to turn it. When I turn it, it operates the choke, but doesn't crank the engine. This lack-of-cranking could be due to the fact that the key is not turning over far enough to engage the starting circuit, or because I don't have the starter wired properly.

I have photos of the current state of affairs if that would help anyone.

Also, where does the fuel line connect to the engine?

Can anyone tell me about fuel requirements... fuel mix, gas only, oil in a separate container somewhere?

All will be appreciated.

Thanks,

Jim
 

jmburock

Petty Officer 2nd Class
Joined
Aug 25, 2005
Messages
174
Re: Basic questions about Mercury motors...

Why not just go to West Marine or Boater's WOrld and pick up a Sierra 6 connector/ push to choke ignition switch with two brand, new shiny keys. That way you won't need the locksmith. Should have A,B,C,S,M,M on the back of the ignition switch- don't forget which wire goes to which.

Hopefully the fuel line and Battery connections pan out. I Highly rec. The mercury repair manual for your motor- can find them on Ebay.
 

jmburock

Petty Officer 2nd Class
Joined
Aug 25, 2005
Messages
174
Re: Basic questions about Mercury motors...

For fueling:

Use mid grade 89 octane gasoline with Quicksilver Premium Plus 2 stroke oil 50:1 mix unless you have a VRO. I'm assuming this is a 2 stroke motor.
 
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