76 Whirlwind burn down

S_Kyle · Post by **S_Kyle** » Mon Feb 02, 2009 11:20 am

Well I've done it now. Looks like I melted the PTO side piston. I still have to tear the motor down and figure out what went wrong with the motor. But I need to know where to get parts. Would It be better to contact the guys at scorpsrus or can I just order from sun and snow locally? Here is what happened.

- Stopped to vist a cousin on my way home
-Went over to his uncles shop to pick up his Everest. I noticed that my whirlwind was done so I went over and puled the rope. Started good so i decided to take it for a maiden voyage. Ran well cruised at around 40 mph to his house, no problems.
- Noticed the engine was a little warm but figured it was a warm night and a fan cooled.
- We decided to make a quick run to the local bar or a beer, as it was not far away.
- Low on fuel I borrowed some from him, it was just regular fuel but I did not see the problem with just one tank.
- Rode it 8 miles and we stopped at another yard for a few minutes. Massey was a little hard to start but not bad.
- Rode another 3-5 miles and met so friends on the trail, talked for a few minutes and it fired right up without incident.
- Made it another 5 or so miles and got to a field, good amount of snow and the Massey was bogging a bit. Then I heard 3 pops and lost power. Pulled the spark plug and looked down the holes with a cell phone for light and it looked like the PTO side piston was melted a it on the exhaust side.
- Luckily his uncle found the sled on his way home that night and dragged it back to his place.

So what did it? I think it was the fan or the PTO side seal. It was making a slight squeak or squeal at low speed/ idle. Does anyone know what material the bores are? What is best for gaskets and pistons? It was a fun little sled to ride and I need to get it back on the trail.

Scott

JDT · Post by **JDT** » Mon Feb 02, 2009 1:08 pm

The parts to rebuild a Cuyuna are easy to find. Trout Creek Sales has pistons on ebay right now. Gasket- seal sets are still avavilble.
After market pistons are still made. The SPI's are real good.

JDT · Post by **JDT** » Mon Feb 02, 2009 1:09 pm

Also Check fan bearings and the belt to see if that was the noise and problem that caused the over temp.

S_Kyle · Post by **S_Kyle** » Mon Feb 02, 2009 1:31 pm

I was wondering if the fan might have been to blame. To top it all off the near perfect hood got caught by the wind ad hit the bumper, taking a dime sized chunk out of it.

JDT · Post by **JDT** » Mon Feb 02, 2009 1:36 pm

Yes, without a functioning fan she is going to get hot fast. A new belt is $4 and proper tension is important.

If you have a bad or missing vane get a different fan. An out of balance fan will take out the bearings and be less that effecient at moving air.

S_Kyle · Post by **S_Kyle** » Mon Feb 02, 2009 1:55 pm

I just hope I didn't gouge the bore or wreck the crank when she went.

JDT · Post by **JDT** » Mon Feb 02, 2009 3:03 pm

Dennis at Scorps R-Us would have anything you would need also. I will be seeing him at the Scorp Show next weekend I am sure.

You know any Masseys built at Crosby are also welcome to the show. There are always several there. That is where I saw the Murader that we talked about a few years ago.

S_Kyle · Post by **S_Kyle** » Mon Feb 02, 2009 5:22 pm

Anyone know what the bore in these motors are?

JDT · Post by **JDT** » Mon Feb 02, 2009 6:14 pm

67.5mm

S_Kyle · Post by **S_Kyle** » Mon Feb 02, 2009 9:57 pm

Thank you, I will have to see what I need for pistons tonight.

S_Kyle · Post by **S_Kyle** » Thu Feb 05, 2009 8:35 pm

I guess I have to pick my piston brand. I talked with the guy that is going to rebuild them today. He said get 3 types STP (his preferred), Wiseco and boxer. All for 70 - 80 a piece. I looked on EBay I can get LLP for between 20-50 dollars for a set!

I believe that I have LLP in one of my LF's without incident. Any advise will be appreciated.

Scott

JDT · Post by **JDT** » Thu Feb 05, 2009 10:45 pm

Sounds like you rebuilder is a little greedy or needs to shop around some more. SPI's are $45 each.
I have used LLP's and as long as you are staying stock they are fine.
Times is tough, got to be thrifty.

S_Kyle · Post by **S_Kyle** » Thu Feb 05, 2009 10:57 pm

The price he gave came out of his ordering book. So with the profit from his supplier tacked onto the price it inflates a bit. I hope to keep the stock bore but will have to see what he says later tonight. I think I will just order the LLP's at 1/3 the cost.

JDT · Post by **JDT** » Thu Feb 05, 2009 11:13 pm

You have a 440? There is both 340 and 400 NOS pistons on ebay right now at $20. Cedar Farms is the seller. Nice guy, I have dealt with him before.

S_Kyle · Post by **S_Kyle** » Fri Feb 06, 2009 2:24 am

I have to be blind, I can't find him on ebay.The only ones I see are from troutcreek sales.