prop meets rock

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Jim Seamans

Jim Seamans

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Mar 21, 2004
2,175
Hunter 356 Cobb Island, MD
The other day My prop hit a few rocks. It shreded the metal a little and I thought that was all but the other day I was motoring and the prop just disengaged. I hear there is a shear pin that gives way and am thinking that is the problem. Does anyone know what parts I would need to order, the cheapest catalogue, and if putting in a new prop/shear pin is beyond intermediate mechanical abilities.
 
r.w.landau

r.w.landau

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Jun 2, 2004
1,438
Oday 25 pittsburgh
Newbie, what year and make and sizemotor

Newbie, Also, some ( most newer props) have rubber hubs. When thesesgo bad they can be replaced at about $25-$75. I would not do that if the prop is damaged. Some good prop shops can repair the metal portions of the prop. You may want to concider a new prop. If you are getting vibration, this will ruin the seals and the lower unit gears. The prop would be a minor price to the lower unit rebuild no matter who makes it. It does not take long to do a lot of damage. r.w.landau
 
Jim Seamans

Jim Seamans

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Mar 21, 2004
2,175
Hunter 356 Cobb Island, MD
1994 nissan, 8.8 hp

it isn't working now. After hitting the rocks it worked for about 1o min's. Then it just quit pushing the boat. Bubbles came out and the boat moved VERY slowly, while the prop spun, I think from the exhaust bubbles.
 
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Kevin Dufresne

Sounds like you "spun your prop".

As mentioned, there is a rubber bushing in the prop to keep from destroying the engine (crankshaft, etc.) when you do something exactly like hitting rocks. A long time ago, there was a shear pin, that you would replace, but unless it is a really old motor, you probably don't have one of those. If you sheared a pin, you would not move at all, as the prop would not spin at all. A prop shop can replace your rubber bushing and you should be back in business. A lot of people use this occasion to buy another prop, get the original fixed and then use the original as a backup, should this ever happen again.
 
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Bill4867

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Jun 4, 2004
56
- - Sasafrass
Props

I assume your dealing with an outboard motor? It sounds like you spun the hub. If that is the case your are best off to have a spare prop with you, even an cheap plastic one. The rubber hub can even let loose due to age and the back up prop doesn't do any good in the shed. I'am sure you know how I learned that lesson. If the old prop is beat up badly from its encounter with the rocks it will probably need to be replaced, a prop shop can only do so much before it doesn't make sense. Once you start talking repressing the hub, blade and filling the blade I'm not sure it will make much sense.
 
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Pete Peterson

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May 21, 2004
35
Catalina 320 Westbrook, CT
Shear pin?

If it is the shear pin, you will know it immediately after you unscrew the prop - a very easy job. Take a look inside your motor cover - sometimes the manufacturer clips a spare shear pin there. If not, take the two pin pieces to a marine suppy store to get the proper diameter and length replacement. In any event, get a spare of your own for next time.
 
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