hot drive shaft tube

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red42hj
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Joined: Sun Oct 16, 2016 1:31 pm
Location: wiltshire

hot drive shaft tube

Post by red42hj »

Have tested my tc 102 in the water. It started out alright, but got consistantly slower.I found that the drive shaft tube, and the gear lever became very hot. Stripped it down and could not initially find anything wrong. Then I found I could move the flywheel up and down approx 3-4 mm due to the locating screw not being tight enough. That in turn moves the shaft in the lower bush. Could hot gasses bypass this bush to heat the affected parts? Thanks in advance!
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Charles uk
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Re: hot drive shaft tube

Post by Charles uk »

Where does the hot gas come from & which locating screw?

Are you running 25:1 or 10:1 fuel mix ?
Make it idiot proof and someone will make a better idiot.
red42hj
Posts: 110
Joined: Sun Oct 16, 2016 1:31 pm
Location: wiltshire

Re: hot drive shaft tube

Post by red42hj »

I'm not saying I've seen or felt hot gasses coming out: I'm just trying to find a reason why the gear lever and drive tube would get so hot that I can barely touch them. the locating screw I mentioned is the one that prevents the flywheel from moving out of timing position, under the base plate.
red42hj
Posts: 110
Joined: Sun Oct 16, 2016 1:31 pm
Location: wiltshire

Re: hot drive shaft tube

Post by red42hj »

I'm running on 10:1 fuel
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Charles uk
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Re: hot drive shaft tube

Post by Charles uk »

That sounds like friction from the bottom main bearing, might be slack or bent crank.

Crankshaft end float of between (50 to 100 thou) is a standard feature .

Check out John Williams or ebay a good 102 crankcase & crank won't be expensive.
Make it idiot proof and someone will make a better idiot.
red42hj
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Joined: Sun Oct 16, 2016 1:31 pm
Location: wiltshire

Re: hot drive shaft tube

Post by red42hj »

Ok, thanks Charles.
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Charles uk
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Re: hot drive shaft tube

Post by Charles uk »

I'll wager some of your crankshaft will have turned blue, from the heat, has anyone got a pic to illustrate?
Make it idiot proof and someone will make a better idiot.
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