How can you tell if you've worn out the cup of a prop? Is there a way to measure this or is it just best guess visual inspection?

The edge of my prop gets so sharp you could shave with it.

Get a tape and measure across widest part. Then compare it against what a new prop should be

Yeah. I measured the length of the blades. They were 5 1/2 inches. Then called manufacturer and they told me 5 1/2 is normal new prop length.

The reason I'm asking is I've lost about 4 mph on speed.

After the lady said the 5 1/2 inch length she asked me if I'd worn the cup of the prop down but I'm not sure how to determine if its messed up.

Post a pic of it...

Along with the speed loss have you noticed your RPM's creeping up?

u can have just the cup put back in if u need to thats prolly where your speed is goin

I have not seen rpm increase. It's still between 3820 to 3890 rpm. It's on a godevil (don't laugh) and the trim knob has not been moved.

Here's some pics

[img]http://img.tapatalk.com/d/14/01/20/8e7usymu.jpg[/IMG[IMG]http://img.tapatalk.com/d/14/01/20/py8ype7e.jpg[/img][IMG]http://img.tapatalk.com/d/
14/01/20/anyredyv.jpg[/IMG]

Let's try this again

Looks like the cup is there.

Try not to pick up the fat girls!

Yeah. Don't think the wife would like fat girls wearing out her seat in the boat.

Good response. Cup looks ok

Good deal. Just didn't really know what to look for. Wanted to be sure it looked good since I just signed up for the SETX mud run. I may go ahead and order a new one so I have a spare.

Well, see ya there. I'd run the old one. Have you tried shifting some weight around?

I think I got it balanced pretty good. Tank up front. Battery in rear. I ride as close to center of boat as I can and still drive. No other weight in boat except safety gear. If I have any other gear in boat it rides towards front. It may be from unseen weight. Mud/ sand in boat under the sides that I can't see. It's been a while since I power washed it out.

This prop I have now has been going for 2 seasons now so I think its done good do far.

Ca, c'est bon! I figure on one a year atleast. Now I'm in it 1-3 times a week and run in sandy hard bottom skinny water beaucoup. My godevil longtail runs a 9x3 and when I replaced it it measured 7¾". Just a Tad bit of wear.

Yeah. I run hard sandy bottom too. I just don't dig it in. I let it float and slowly ease out to deeper water. I'll see ya in south Texas soon.