OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Engines Questions On Victa Two Stroke Engines Victa 2 Stroke Powertorque Rebuild 'how to' guide

Hi all,

I know this may be a bit of a wishfull thinking, but would it be possible for someone to post a 'how to' guide for rebuilding a Victa Powertorque engine

I have looked through the forum but dont think i could find one.

luvpsi, the workshop manual for that engine (which is only 8 pages) is available for download in the manuals section of this site.

Hi Grumpy,

I am aware of the Manual which is very handy, but I thought maybe someone could share some info on how to hone scored blocks etc..

Thanks

also is this hone sufficient for the job?

https://www.outdoorking-forum.com.au/index.p...785&zenid=i7klafmad9bpjutpafv20dgc01

I think that hone is intended for situations where the bore is not scored noticeably. If your bore is not scored, it will most likely be OK if you follow the instructions. I do not think it is capable of removing scores. Also, if you remove enough metal to remove scoring, you need an oversized piston and rings.

There is some information on honing in this thread:
https://www.outdoorking-forum.com.au/forum/u...=5705&Words=honing&Search=true#Post23859

I understand now. So the hone is used for minor work such as in cases when perhaps new piston and rings are needed but the bore just needs a clean up..

what is used in cases when the bore is scored but still usable? Is this that can be done DIY?

The problem is that if the scores are several thousandths of an inch deep, by the time you hone them away the bore will be so far oversized that a standard piston will rattle in it and standard rings won't seal properly. Hence you use a hone for breaking the glaze in a used cast iron bore (Briggs recommends that you do not break the glaze in an aluminium bore, by the way) or just for polishing out scuff marks up to perhaps 0.0005" deep. If the bore is scratched significantly, you rebore the cylinder and fit an oversized piston and rings, or you browse around the local tip for a defunct engine with a decent bore.

Unless you have a good milling machine with a boring head attachment, or a fairly big lathe (and the latter is a rather crude approach), home reboring is not very practical.

Thanks Grumpy!

I am hoping to rebuild my first powertorque soon and this info will go a long way

But keep in mind that the power torque engine is very forgiving as far as tollerances and imperfections go.

The bore would have to be pretty horrendous to not be able to bring it back to the point where you could not make a running mower out of it.

Two things stop you from doing so. Honesty and longevity so far as someone like myself.
For a guy in his garage with his own mower the only issue would be longevity and performance. Both would be compromised to a certain extent.

Thanks for that info Bob. I am in the process now of taking apart a powertorque engine with hope to get it running again. I removed the piston and conrod but am now stuck with getting the flywheel off..

The boss for the blade plate is on a taper.

Anvil and hammer and that will come off.

Then the flywheel will wiggle off.


But if the crank bearings are fine and the lower seal has not covered the whole underneath of the motor with oilly muck, the bearings will be fine. No need to pull it apart.

Thanks Bob. The motor came apart easy! But not without me damaging the thread on the crank with a hammer I guess I will need to re-thread it now..

The piston was shattered in a few places and because there was loose pieces in the block, there are now 3 grooves in the chamber about .5mm deep..

Can this block be re-used or does it have to be remachined and oversize piston fitted?

Sounds like i would throw it away and look about for another mower with a good motor on it.

Tip shop, hard rubbish, eBay too but they are usually over priced.


Beauty is they all mount up the same, things mount to them the same.

If you want to know the condition of a used one, Grab a few screwdrivers and a torch, remove the cowling, pop the muffler off and have a look.

Thought so.. I have 4 spare motors at home too and some of them should have a healthy block

I often hear mentioned that rubbish tips have mowers that can be purchased? Anyone know of such a place in Sydney?

If you are in actual sydney i would suggest looking about for a scrap yard over a rubbish tip.

Rubbish tip is good if you are semi rural or rural, stuff ends up there, they have a scrap pile.
In suburbia stuff like that tends to end up in hard rubbish or scrap collections.
Scrap yards are nuts if they wont sell you a mower for double the scrap price.