prop issues-Mercury

brad1756

Cadet
Joined
Mar 23, 2004
Messages
18
I've got a '74 Mercury 500 and I've dinged the prop, actually I've ruined it. I've had a spare for five years of so that I've carried with me. Well, I don't know if it will work. It is a Michigan 032043. I've slid it on but it seems a little tight when I turn it(nut not on). The old one would turn easily. I'm thinking that it's going to be too tight, but from what I can tell, it's the correct prop for it. Any thoughts on my predicament? Thanks is advance.
 

brad1756

Cadet
Joined
Mar 23, 2004
Messages
18
Re: prop issues-Mercury

A little more information for those that may do a search later for this problem. I had a spare motor, but did not bother to look up the actual year model. It looked identical to my '74. The new prop I had fit the shaft well, but was rubbing the housing or something and got real tight when just slid on(no nut). The hub of the new prop was made different(different offset length?)than the prop I had ruined. I took the prop off the spare motor to look at it, and it was made more closely to the new prop. The washers/spacers were different than on my mounted motor. I took the washers/spacers off the old motor and used them to mount my new prop on my mounted motor, it rubbed a tiny bit by hand, but when tightened up it would spin fine. I've ran it a couple of times and it's all good. I don't know if those motors came out with two different sets of washer/spacers for each model year(I doubt it), but a prop and washers of a different year will work. You just have to make sure that the type of hub has the corresponding type of washer/spacer. Thanks for your support.
 

steelespike

Supreme Mariner
Joined
Apr 26, 2002
Messages
19,069
Re: prop issues-Mercury

Is the prop the same demension (pitch) as the old one?Is the rpm within recommended range?
 
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