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Home✈️Aircraft🚁HelicopterGasser Model RC HelicoptersOther › Photo illustration of engine disassembly/assembly
08-18-2008 04:46 PM  12 years ago
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TooBizzy

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Georgetown, Ohio USA

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Photo illustration of engine disassembly/assembly
Here is a pretty thorough tutorial on how to disassemble/assemble a 2 cycle engine. The illustrations are of a 62cc Kart motor, but all the concepts are the same.

http://www.russellkarting.com/IAME/...sykart%2062.doc

This is to hopefully make it more clear as to what I and others were trying to convey in this thread before it was closed:

http://www.runryder.com/t452660p2/

Please refer to fig. 5.....
P-Gasser Se, Raptor 50 Se Hyper, Raptor 30v2, Trex450se, 3dx450...
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08-18-2008 05:55 PM  12 years ago
j.8

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Denmark

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thanks for sharing

Regards Bo
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08-19-2008 05:15 PM  12 years ago
AceBird

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Utica, NY USA

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This is to hopefully make it more clear as to what I and others were trying to convey in this thread before it was closed:
Size usually makes a difference …

On the larger engine you will notice that the clutch is keyed to the shaft so the taper is not going to flop around when you first tighten it up using a spanner wrench. Wrenching the fan is not a bad idea but initially you need to hold the crank on the smaller engine to get the joint tight enough before you can use the spanner or belt wrench because there is no key.
Ace
What could be more fun?
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08-19-2008 06:45 PM  12 years ago
TooBizzy

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Georgetown, Ohio USA

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Ace…The point we were trying to make was, that it is not a good idea to
put a wrench on both ends of a crankshaft and tighten/loosen against each other. It will twist the two crank halves at the connecting pin
because the two halves are just pressed onto the pin. I do agree that sometimes, IF the shaft isn’t keyed, then the flywheel or fan can spin
on the shaft, but that doesn’t happen all the time. That depends on the match of the tapers.

With all that said, along with the aid of a piston stop, the forces are evened out between the stop and spanner resulting in less chances of spinning the two halves. As long as: if you are trying to tighten/loosen the fan nut, that you have a spanner attached to the fan. Not the flywheel. Vise-versa.

Another thing, when I make a comment like:
That is exactly right. The two crank halves are PRESSED together on the connecting pin.
And you respond with:
No it is exactly wrong. The torque on the first pin is the same no matter how you do it.
You may want to do some research before making such comments. People come to these forums for information, and when you make comments like that, it’s really hard to tell right from wrong. You need to be able to back up what you say. And I think I’ve done that pretty well!
P-Gasser Se, Raptor 50 Se Hyper, Raptor 30v2, Trex450se, 3dx450...
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08-22-2008 01:58 PM  12 years ago
jetfixrguy

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Florida

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thanks for posting that link TooBizzy!
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08-22-2008 05:12 PM  12 years ago
TooBizzy

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Georgetown, Ohio USA

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Your welcome. Maybe a good reference tool when there is a tug of war going on! P-Gasser Se, Raptor 50 Se Hyper, Raptor 30v2, Trex450se, 3dx450...
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