Can anyone help identify this engine

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Ludwig II

Well-Known Member
Jul 17, 2012
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I think people become fixated on a thing, and stop thinking about the alternatives; sometimes when the alternatives may be better. It's a fashion or social focus phenomenon.
 

krygods

New Member
Dec 7, 2014
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Lakewood, Ca
I'll tell you one thing about this little engine, if you hold the engine with the flywheel removed in one hand and the flywheel in the other they're almost identical weight wise
 

maniac57

Old, Fat, and still faster than you
Oct 8, 2011
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I have to admit you got me. I missed the side exhaust. The cases look so similar I don't feel TOO bad though.
Regardless, they are sweet engines, especially with a better slide carb.
Better than Briggs quality, easy to work on but tough to find parts for is what I remember.
 

krygods

New Member
Dec 7, 2014
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Lakewood, Ca
I have to admit you got me. I missed the side exhaust. The cases look so similar I don't feel TOO bad though.
Regardless, they are sweet engines, especially with a better slide carb.
Better than Briggs quality, easy to work on but tough to find parts for is what I remember.
Can you post a link to one of these better slide carbs? Thanks.
 

curtisfox

Well-Known Member
Dec 29, 2008
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minesota
What did you use for clutch centrifical ? and the front fork after market? Sure is a KOOOL bike,thanks for posting. I gona save it................Curt
 

silverbear

The Boy Who Never Grew Up
Jul 9, 2009
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northeastern Minnesota
Not trying to jack Krygods thread but just wanted to post a pic of a Tecumseh H-35 powered bike for Silverbear. This was my first post I believe many moons ago. We had this bike forever but it was sold in a lot when I moved.
Notice its a rear exhaust.
http://motorbicycling.com/showpost.php?p=230261&postcount=1
That's a nice, clean build. I see it has belt initial drive... what follows that? If it climbed hills and could do 30mph, what more could you ask for? Perfect. Thanks for sharing that!
SB
 

krygods

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Dec 7, 2014
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Lakewood, Ca

silverbear

The Boy Who Never Grew Up
Jul 9, 2009
8,325
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northeastern Minnesota
I was wrong about having 3 H40 engines. I don't have any. One is a Briggs, but don't know the hsp. 2 are H50 Tecumsehs. Looked up the displacement and the H50 is 200CCs. Unless it is low revving I'm thinking maybe it is too much motor. Supposed to have a lot of torque and was used on mini bikes and go karts. Mine are from snow blowers. The Briggs is also a flathead, about the same size. I may still break down one of the H50's to see how small it gets without the shroud and pull start assembly. Don't know how it might fit into a 51 Schwinn cantilever frame without breaking down the engine and setting it in place.
SB
 
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cannonball2

Well-Known Member
Oct 28, 2010
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Colonial Coast USA.
There have been several builds done with a 5hp Briggs in that frame(mrsfan I believe that's right). I think the Tecumseh is about the same size, don't worry about the HP or torque, just use the throttle to apply what you need.

The Tecumseh bike of mine ran a cent clutch belt primary to a chain drive secondary. This was well before MB parts were common so it used go kart sprockets and chain. I believe that's a 60t rear sprocket. Its what it took to get the ratio needed. We have such a better supply of MB specific partts now.
 

Ludwig II

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Jul 17, 2012
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I saw a Tecumseh 4hp and it looked familiar. It turns out the design was used by Suffolk Iron Foundries on their Colt and Punch lawn mowers for many years. Unless a lot of changes were made, it might be possible to interchange parts between them.
 

krygods

New Member
Dec 7, 2014
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Lakewood, Ca
Early this morning I went hunting in the alleys around town for some hardwood to make a drive roller. I ended up finding a old beat up table that I could use. It took four pieces to make a long enough roller so that I didn't have to use a clutch collar like canonball did. I still have to go and purchase some washers for spacers plus gorilla glue to laminate the pieces together so I just have them test fitted in the pictures.

Cannonball what did you use for the rubber spaces that allow more compression?
 

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krygods

New Member
Dec 7, 2014
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Lakewood, Ca
Heres a picture of the bike that I'm going be propelling with the engine.

Also included a picture of some 2x2x3/16 angle that I harvested from the dirt in my backyard. Plan to use it for the engine mount.
 

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cannonball2

Well-Known Member
Oct 28, 2010
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Colonial Coast USA.
I used part of a horse stall mat. Pobably any compressable rubber about 1/4 inch thick will do. Use a close 5/8 washer. It must bottom on the cranks shoulder. You can glue the rubber to the roller if you are only gonna use one size. It will work just as well left loose if you need to swap it from roller to roller. Use a good thick washer under the bolt so it evenly comprsses the roller and doesnt deflect.
 

Ludwig II

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Jul 17, 2012
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There are different sorts of epoxy resins for different woods, if you want to go down the route of total adhesion. I was told years ago by a Man Wot Knew Fings about it, that different woods have varying degrees of acidity, and affect the adhesive used, so it has to match them.
 

cannonball2

Well-Known Member
Oct 28, 2010
3,682
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Colonial Coast USA.
That's true when structural strength is a must. For the rollers its not critical. I would venture a guess that the rollers would function on compression alone. It doesn't take a lot to drive a FD MB, the ratios are pretty easy on every thing. Especially the wheel. The tire is the stressed element, the wheel, spokes etc. are basically along for the ride. There is no torque applied through them for driving purposes. The roller is not heavily loaded like some components of other drives. Its about the most basic form of drive there is and the most unique. It took me a while to appreciate it doesn't matter what size the wheel is it will always go the same speed with the same size roller. How cool is that!