3/16 shear pins

[noodles]

Where is a good place to get shear pins in a large quanity. Like 200 at a time. Can you use 3/16 ss rod cut to size? I have quite a bit of that on hand. Just wondering what most of you run. Thanks

[Big Don]

We use pre-hardened clevis pins from Aircraft spruce www.aircraftspruce.com, they come in different lengths. Part number is AN393-(then whatever length you want).

[noodles]

Thanks Don will check that out.

[SeaBat]

We are presently using 3/16" Dia. x 1" long 416 SS dowel pins for the OMC "A". Can be purchased at various places such as tool suppliers, fastener suppliers.....THey work extremely well.

[Yellowjacket]

Subject was covered here not long ago...

Here is a link

https://hydroracer.net/modules/News/s...&op=nextnewest

Subject covered at length. I've been getting mine from McMaster Carr, pretty cheap. They have them in different lengths, pick what works for your motor.

[SeaBat]

MSC Industrial Supply also has them. $81.81/100 for 1"

[17W]

Evinrude Part #

Go to your local Evinrude Dealership & obtain part # 307949; have used them for years under Yamatos. I too believe Palmy has used them under his D Mod.

[noodles]

Thanks everyone I went back and read the older posts and it helped alot. Sorry I didn't the old post first

[G Stillwill]

I ordered some of the music wire today from Mcmaster Carr along with some clevis pins the music wire comes 3 feet long and 5 pieces to a package for around 14.00

[Larry M]

I ordered some of the music wire today from Mcmaster Carr along with some clevis pins the music wire comes 3 feet long and 5 pieces to a package for around 14.00

The music wire is the best shear pin material I have found and I have tried a lot of different material. I have tried several makes of clevis pins and didn't have any luck at all with them but I know people use them, and yes I have used the aircraft grade clevis also.

Larry Mac

[joejohn44]

The music wire is the best shear pin material I have found and I have tried a lot of different material. I have tried several makes of clevis pins and didn't have any luck at all with them but I know people use them, and yes I have used the aircraft grade clevis also.

Larry Mac

with the HP you are making, Larry, Kevin shears a lot of pins...I have been waiting to walk past your pits and see a splined shaft!!!

[blueskyracer]

The music wire is the best shear pin material I have found and I have tried a lot of different material. I have tried several makes of clevis pins and didn't have any luck at all with them but I know people use them, and yes I have used the aircraft grade clevis also.

Larry Mac

I gave up last year on 3/16 shear pins and went to 1/4..Did not lose a one all year and just made 3 pins for the season out of grade 5 bolts.. If I run two D mods this year I will have to find some 3/16 that work.. I hope the daughter changes her mind and stays in C mod.. We found clevis pins worked fine till we steped up to more power with the D mod.. I know Kevin lost a pin at Nationals right in front of me

[Larry M]

Joe John I think you have us mixed up with the Nichols, Mason race team. They are the ones making real HP!! We have threw out a few pins but I can't remember when we did shear a music wire pin.

Larry Mac

[modhydro]

Shear pin thoughts

Regardless of what shear pin material or type you use, keep this in mind:

It can only take a certain amount of shearing stress before it breaks. If you crank the hell out of your prop nut to the point of deforming the pin, you have just used up a percentage of its shear resistance. I have had this discussion with guys and they never seem to make sense of it. Think about it before you try to cut the pin into thirds with your prop nut.

Because of the effects listed above I only use the aircraft clevis pins, torque the prop nut to just snug and then put a safety wire through the hole that just protrudes from the hub. ( you need a few lengths now for various prop hubs). I have lost far fewer pins this way. On the 750mr I was still having some issues now and then so went to 1/4" and have never sheared one and like others have used the same pin for seasons. I still use the AN aircraft clevis pins with the safety wire.

Steve Roskowski

[David_L6]

I like the pins that Steve Litzell sells.