I have a 5.7 OMC with the Cobra drive.
The prop I have on there now is an aluminum 15.5 x 15P. Pretty sure its the wrong prop but have been working out some quirks with the engine first.
I read on here about putting a mark on the hub and prop and seeing if it is spun.
Today I went for a 30 min cruise just to see how my engine runs with the new coil I put in and I marked the prop too to see if it is spun.
On the way back when we got to the small channel that leads back to the dock. I let my gf drive while I looked to see if the new coil was getting hot. When I took up she is texting someone and is way too close to the side of the channel. I grab the wheel but its too late and we hit the bottom. Its all sand but still. We were at idle speed maybe 4 kts.
It drug on the bottom and I immidiatly put it into N and turned off the engine.
I trimmed it up some and started the engine and got us out of the shallow area.
Checked out the drive and no dents or damage. None to the prop either.
I look at the marks I made on the prop and the mark on the hub and the mark on the prop have moved 90 degrees or 1/4 of the dia of the prop.
I have never had any of the symptoms of a spun prop. No high RPM reving or feeling it let go. I just know its an older prop which is why I checked to begin with.
So is this for SURE a spun prop? Is there a chance it just slipped some when hitting the sand? I'm not too sure how it works but is it that if the hub slips ANY from the prop that means its toast and its spun?
Thanks so much!
The prop I have on there now is an aluminum 15.5 x 15P. Pretty sure its the wrong prop but have been working out some quirks with the engine first.
I read on here about putting a mark on the hub and prop and seeing if it is spun.
Today I went for a 30 min cruise just to see how my engine runs with the new coil I put in and I marked the prop too to see if it is spun.
On the way back when we got to the small channel that leads back to the dock. I let my gf drive while I looked to see if the new coil was getting hot. When I took up she is texting someone and is way too close to the side of the channel. I grab the wheel but its too late and we hit the bottom. Its all sand but still. We were at idle speed maybe 4 kts.
It drug on the bottom and I immidiatly put it into N and turned off the engine.
I trimmed it up some and started the engine and got us out of the shallow area.
Checked out the drive and no dents or damage. None to the prop either.
I look at the marks I made on the prop and the mark on the hub and the mark on the prop have moved 90 degrees or 1/4 of the dia of the prop.
I have never had any of the symptoms of a spun prop. No high RPM reving or feeling it let go. I just know its an older prop which is why I checked to begin with.
So is this for SURE a spun prop? Is there a chance it just slipped some when hitting the sand? I'm not too sure how it works but is it that if the hub slips ANY from the prop that means its toast and its spun?
Thanks so much!
