1974? Mercury Model 40 4hp

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KillerKilgore

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Eastern Bluegrass on the WVa border
Anybody have a manual or info on this outboard.

SN 3939849

Just pick it up yesterday. There is rubber rod/tube that is loose on the leg and I not sure what it does.
There is also a spring at the transom mount that is broke and not sure what it does or where it goes.
I think the spring works with the lock the engine uses on swivel so the boat to backup but not certain.

What is the fuel mix, 50:1?

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20171001_134649.jpg
20171001_134856.jpg
20170930_175313.jpg
20170930_174531.jpg
 
KillerKilgore said:
Anybody have a manual or info on this outboard.

SN 3939849

Just pick it up yesterday. There is rubber rod/tube that is loose on the leg and I not sure what it does.
There is also a spring at the transom mount that is broke and not sure what it does or where it goes.
I think the spring works with the lock the engine uses on swivel so the boat to backup but not certain.

What is the fuel mix, 50:1?

20170930_174700.jpg
20171001_134649.jpg
20171001_134856.jpg
20170930_175313.jpg
20170930_174531.jpg

I have this same motor, so the loose rubber rod is used to lock the motor for reverse. It's supposed to sit inside that little notch, kind of a pain in the arse but doable. Mine I'm running 50:1 and dont hardly have smoke and the temp of the water coming out seems to stay consistent. I am having issues with it cutting out on me even wide open but I think it's my fuel float in the carb being gunked up. They aren't too bad of a motor and can find parts pretty easy if you go through napa marine book. I'm not sure what the troll lever does, I've messed with it in all sorts of rpm ranges and it doesnt seem to make a difference there. Make sure to change gear oil before taking it out and I hope for the best!
 

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