Changing Hub

cyber

Petty Officer 3rd Class
Joined
Aug 9, 2010
Messages
82
Is it possible to remove the 13 spline hub from an OMC prop and replace it with a 15 spline Merc hub??
The diameter and pitch are identical and the sizing seems to be as well. Thanx for any input!!:)
 

Frank Acampora

Supreme Mariner
Joined
Jan 19, 2007
Messages
12,004
Re: Changing Hub

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YES! That is, if the OMC prop will fit the lower unit of your Mercury. Here is an older bronze prop that I re-hubbed from OMC to Chrysler and a newer prop re-hubbed from OMC to 15 spline Force.

Press out the old 13 spline hub with at least a 2 ton press. Buy a NEW 15 spline hub from HMS hubs. The old hub--if you pressed it out of a Merc. prop will be questionable and may even be destroyed. see the first two photos of the white prop with the bronze insert pressed out but the rubber still inside. It needed to be cut out before I pressed in a new hub.

Use an appropriately Sized bearing cup as an inserting tool-- I use the forward gear outer race from a large Force engine-- Lubricate the rubber hub and inside of the prop with soapy water. Press in the new hub. Let sit for a day or two before using to allow the water to dissipate and the rubber to "grab"
 
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