Prop for my Merc foot???

[blueskyracer]

I am looking for a good 3 or 4 blade prop for my Merc foot.. It has a 11/16 shaft and a 3/16 shear pin hole.. All of my props are 11/16 with a 1/4 shear pin hole.. I would of never bought this set up if I had been told the truth but I would like to make it work.. The only other thing I can do is get the hole in the foot shaft drilled to 1/4

[Larry Darneille]

Mike if there is a machinest around drill a 3/16 shear pin hole about 90 degrees from the present hole in you prop.

[Rocket]

Prop for my Merc foot

Hi Mike
I have several props and I need a D Foot, I run the small shear pin hole so your set-up would work for me. I can also build you a prop anyway you would like. Thanks Skeet

[pops67g]

Listen to Larry

Just put a second pin hole in the props you have. I have a number of wheels that were done with both size holes by the builder so should be an easy fix.

[blueskyracer]

Thanks for the ideas.. I am toying with a second hole but it wont be easy on a three blade.. Also toying with having the shaft drilled up to 1/4

[Guest]

Two holes in a prop are better then opening up the shaft hole.

Mike,
I believe that if you open up your prop shaft pin hole your asking for trouble. If your running a D or E MOD the reduction in area through the pin hole raises the net stress in that area enhancing fatigue cracking. I have seen a few folks loose props due to a failure in the pin hole.

Alan

[kampenracing]

Props

I would new holes put in all of my props. Every prop I own has two sets of holes, one for the bass unit and the other for the Komato/Yamato units. We always have Dewald put two sets of holes in each one.

[Dave M]

Either Or

No big dilema, at all. Drill out your propshaft or drill out the props, like Larry said. Our gearcases have 1/4" hole and they did fine under the Mer gearcase. The Yamoto stuff, not so much. Go 1/4" and it will break, stick to 6MM max.

Here is prolly the easiest solution, buy the shear pins that Dudley Malone sells, they are the best I have ever used. There are the small hole. Dudley talked us into trying them on the SEH, and we are having no issues so far. Amazing what the right pin will do.

For the 3 blade that might be trouble, send it to a prop maker, they will drill it. A competent machinist can do it as well. Most use a lathe to cut it in.

Don't fret !! Easy fix. If you need to know what machinists I turst give me a P.m.

[Rocket]

prop for my merc foot

I had trouble with shear pins until I bought some solid dowel pins. If you take them out of the box and install them they are too hard and will snap very easy, but if you heat them up until they start to turn a straw color and then let them cool naturally they become very malleable and super tough. They will bend but not break. Also very cheap especially when you buy a box of 100

[blueskyracer]

Air head here.. So I really do need a prop for this Merc foot.. All my props are for a bass foot which is 1 under.. I just checked and the merc foot is 1:1 so no wonder my boat was a little doggie.. Anybody got something? I need it by next Wednesday.. I did make my own V blocks and drilled two of my smallest props