What pitch is this prop?

[b.gagnon]

It is a mitch Stainless 973001.<br />I just got it from ebay. It says(in marker)17p.<br />I hope it is right, but if not I just bought a Stainless spare for $54!!!

 

[stevens]

Re: What pitch is this prop?

I don't think that number means anything, at least I can't find it in the Michigan Wheel catalogue.<br /><br />In any case, you found a new steel prop to fit your 1979 Chrysler outboard, and for only $54 - Congratulations!<br /><br />No reason yet to doubt the seller's word that it is a 13x17 prop. Please let us know how it runs. It looks good in that picture on ebay:<br /><br />

<br /><br /><br />Oh, by the way, here's a neat page for finding exact replacement props based on the OEM prop number:<br /><br /> http://www.propmd.com/c-593-oem-boat-prop-exact-replacement-list.aspx

 

[b.gagnon]

Re: What pitch is this prop?

Yea this prop is brand new! It is not that I don't trust the seller, it is more the fact that they had no history in marine parts. They more than likely bought a bulk of props somewhere that were already labeled. I will give it a try this weekend. Worst case, I keep it on hand as a spare.<br />One concern that I do have is the weight of this thing. It weighs close to 10 lbs! Could this be a problem with a 1979 Chrysler 70hp?

 

[stevens]

Re: What pitch is this prop?

Yes, steel props in general do feel heavy when compared with alu props. I don't think it's a problem as long as you shift it gently into gear. Once it's spinning, I would think the added weight only means extra inertia to keep it spinning smoothly. Walleyehed, any views on this, please?<br /><br />It'll be fun to hear how the rpm, speed & slip compares with your old prop.

 

[walleyehed]

Re: What pitch is this prop?

The biggest load on the prop is when shifting and load the blades with water-flow, it's not so much the weight as one might think. If we were in nothing but air, the inertia factor would be very great, but in a fluid, it's quite a bit less of a factor. <br />And, when you shift, snap it into gear briskly, don't do it slowly, that just lets the gears grind for more wear before thumping into gear.

 

[stevens]

Re: What pitch is this prop?

"Snap it into gear briskly", but I guess don't slam it straight into reverse from going forward, or vice versa. Take a pause in neutral in between.<br /><br />Or, as it says in my Mercruiser manual:<br /><br />

Control Handle - Operation of the shift and throttle are controlled by the movement of the<br />control handle. Push the control handle forward from NEUTRAL with a quick firm motion to<br />the first detent for FORWARD gear. Continue pushing forward to increase speed. Pull the<br />control handle back from NEUTRAL with a quick firm motion to the first detent for REVERSE<br />gear and continue pushing back to increase speed.