Recent content by keithmylum

I have 1971 40hp mercury 400m. It has been sitting in a barn for the last ten years. I am currently going threw checking everything I can, figuring out what needs to be replaced and how much it's going to cost before I actually start spending money on it. Here's where I'm at. The stator has to...

On My 40 hp mercury when I pull the cord it feels like it is binding up. A guy gave it to me it had been sitting in a barn for the last 13 years. I want to lube the pistons a little and see if I get better compression. Right now all I get is 35psi. What is the best way/ easiest way to do this? I...

I have a 1971 40 hp 400m mercury that I am replacing the stator on. My old stator had a red wire that connected to red on the start solenoid then threw the wiring harness to red positive on the battery. The stator has a black wire instead and says I should connect it to engine ground. Stator...

Re: Prop for older motor

I have a 1971 2stroke 40 hp mercury. Can someone recommend a prop for this motor? Boat will be used for cruising/fishing. No skiing. It is a fiberglass 16ft deep hull boat. Thanks for any help. Everything I have seen says 1977 or newer.

How do you measure an axel? End to End or hub to hub?

I have a 40HP mercury 400 SN is 3049291, I cant not find a model number anywhere or any more info on the motor. I need a few parts for it but cant order because that serial number does not come up anywhere. Any suggestions would be greatly apreciated. Thanks!