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Part needed for McCoy No. 2 .049 engine

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Wanted Part needed for McCoy No. 2 .049 engine

Post  prostreet on Mon Oct 22, 2018 3:08 pm

I'm trying to find a complete coil spring assembly for the recoil starter of a McCoy No. 2 .049 engine. One end has a small rivet in it to hold the end of the spring into the housing and the inner end is riveted to a sleeve that slips over the snout of the engine and turns around it when the spring is wound by turning the prop. I've looked on Ebay and can't see the sense in spending forty or fifty dollars on a used engine just to get the spring. Do any of the members know of a source for the complete coil spring assembly? Thank you for any replies. prostreet
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Wanted Re: Part needed for McCoy No. 2 .049 engine

Post  Oldenginerod on Mon Oct 22, 2018 3:57 pm

Very rare to find a spring intact. The good spring in a second hand engine is probably reflected in the price. Same goes for glow heads. You often have to buy a whole engine to get what you want.

I'm sure I will have one, but as prone to breaking as they are, I'll be hanging on to it, sorry.
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Wanted Re: Part needed for McCoy No. 2 .049 engine

Post  Marleysky on Mon Oct 22, 2018 6:18 pm

I googled "recoil spring wen Mac" and along with this thread a few others show up. Here's a interesting one from 2008 where the guy disassembled the starter, bent the broken end back to shape and had a working starter.    http://www.modelengine.org/phpbb4/viewtopic.php?f=18&t=4636
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Wanted Re: Part needed for McCoy No. 2 .049 engine

Post  ticomareado on Mon Oct 22, 2018 6:51 pm

The "rivet springs" and larger diameter Rotomatic starter springs are from carryover of Wen Mac parts inventory. Testors later decreased diameter of Rotomatic assembly and replaced rivets with a bend in the ends of the springs. The new version springs can be made to reload into older Wen Mac style starters and work fine. Sometimes a little snip/bend is needed where spring anchors to housing. Rebuilding/reloading Rotomatic starters takes practice and can cause you to advance several levels in cursing and swearing until you master it

Best cheap source of new version Rotomatic parts are from pipe bomb engines. And you can usually get a good glow head to boot. One caveat though: The crankshaft and clutch assembly splines are a little coarser on some or all?? of the Testors redesigned Rotomatic starters. Use magnifying glass when in doubt.
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Wanted Re: Part needed for McCoy No. 2 .049 engine

Post  prostreet on Mon Oct 22, 2018 9:16 pm

Thank you to those who have replied to my request for assistance to find a recoil start spring. My spring was found to be broken off where the spring end attaches to the center bushing that rotates around the snout of the engine when I disassembled the recoil starter. This spring steel is tough to drill and I had little success in putting another tiny hole into the existing spring in an attempt to rivet the parts back together which has started my search for a new one. I guess I'll just keep looking on Ebay until something less costly with a functioning spring starter comes up. I appreciate the input. prostreet.
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Wanted Re: Part needed for McCoy No. 2 .049 engine

Post  ticomareado on Tue Oct 23, 2018 9:21 am

There should be another hole opposite the broken rivet in the drive collar. If you don't find a replacement spring you MIGHT be able to put a small Z bend in old spring and make it work.
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Wanted recoil spring starter

Post  prostreet on Tue Oct 23, 2018 11:48 am

I don't think a z bend in the spring would work in the large hole opposite the original riveted location. There's very little clearance between the collar and the shaft that it turns around so I think that the piece of spring on the end of the z bend would cause binding and prevent the collar from turning. The original rivet was center punched inside the collar to expand the rivet end to prevent it from coming out. This kept its profile low which allowed the collar to turn freely once the spring was secured in place on the outside of the collar. I appreciate the suggestion though.
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Wanted Re: Part needed for McCoy No. 2 .049 engine

Post  rsv1cox on Tue Oct 23, 2018 3:32 pm

Is this what your looking for?





If yes, then I will strip it down to the case and starter and send it to you. Just PM me your address.
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Wanted Re: Part needed for McCoy No. 2 .049 engine

Post  ticomareado on Tue Oct 23, 2018 4:51 pm

What do you want for the rest of the engine?
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Wanted Re: Part needed for McCoy No. 2 .049 engine

Post  rsv1cox on Tue Oct 23, 2018 5:18 pm

ticomareado wrote:What do you want for the rest of the engine?

Probably not for sale Victor. I'm always looking for the spares for this type engine, needle etc. The spring starter is good, but the case is trash so if it can be of use to someone I'm willing to let it go.

Bob
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Wanted Re: Part needed for McCoy No. 2 .049 engine

Post  prostreet on Wed Oct 24, 2018 12:45 pm

Hello,

Yes, that is the part that I am looking for to repair my broken Rotomatic starter. Thank you very much for the part and I will send you my ship to information. The help is most appreciated. Thank you.

Joe
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Wanted Re: Part needed for McCoy No. 2 .049 engine

Post  rsv1cox on Wed Oct 24, 2018 1:54 pm

PM sent.

Bob
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Wanted Re: Part needed for McCoy No. 2 .049 engine

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