OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Engines Questions On Victa Two Stroke Engines Power Torque flywheel dilema

Morning all,
A friends Aussie PowerTorque had a wrecked conrod bigend bearing. And main bearings as well and scored bore.
So I thought I'd use a chinese PowerTorque I had incomplete..... I had to use Aussie PT coil but it would not fit under chinese flywheel with cogs on outer perimeter for electric start. I'd just sway flywheels. Chinese flywheel has no number on it.

I never took flywheel off before, pretty easy. Set coil gap, but there was not a good fit with a bit of a wobble, it might tighten up when I put round steel thing on and baseplate and bottom nut.
Aussie flywheel part no. MAO5548A
The chinese motor would not run properly....... found out why when I took flywheel off. It has moved and squashed the flat so changing the timing.....

Any ideas, just try it to see if it tightens up...
speedy

Here's why it woddles...... tapered shaft on chinese and straight shaft on Aussie....
I'll change crankshafts....and use Aussie flywheel...
speedy

Speedy you must not be worried about dropping anything on your toes are you? I wear steel toe shoes for a reason. They prevent most painful toe impacts. They wont prevent the most serious injuries but do cut down the risks.

I use steel cap boots when I mow. Thanks for bringing up this hazard as well.
Reading about what a man went through after chopping his big toe off under a ride on mower, prompted me to buy a pair.

I wear closed in shoes to mow, but like air around my toes in the hot days up here. In the 30's lately.
cheers speedy

anyway, I put the Aussie crankshaft in the chinese block, chinese piston. and tried to put it back on Aussie base...........
one hole didn't match up. I'll try it with three bolts. It will be a trick o drill a hole in correct position , roughly the red cross. and put a spacer between base and block...........
cheers
speedy

Hi speedy,

good to find out they changed the position to make engine swapping tricky. Maybe it was for better rigidity or to dampen vibration, who knows.

Hi speedy,
I have pulled hundreds of PT's off their bases and I have never seen one like that

Hi NormK,

it could be an ecotorque that has a revised pattern (that attempts) to prevent you fitting the more polluting older engines.

Hi all,

While the Eco Torque engines look like they've been manufactured poorly with large air-cooling fins, that was actually the design recommended by UTS when re-designing the engine to meet newer emission standards, so it's not a result of the country of manufacture. You can find information about this in Technical Bulletin 03/07 322 (Attached), and the Museum of Applied Arts & Sciences website.

Aside from those changes as far as I'm aware and from what I've seen, there was no change to the bolt hole locations on the engine.

Obviously, I wouldn't run the mower and wouldn't recommend anyone else run the mower with only 3 bolts holding the engine on either, even though it may be/feel entirely secure.

thanks pau13z, that's very interesting.... I read on ODK somewhere about the chinese connection.....
I will try to put something together......
cheers speedy