OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Engines Questions On Victa Two Stroke Engines Power torque engine seen better days

Hello Shaun here i havent been around for a while but i am back with a question about a power torque engine that i was given by a mate to see whether it could be fixed i recon that i know what is wrong with it by doing some reasurch on here. Bear with me though i think that you people will come to the same conclusion as i have. I did the usual things like check spark which was there and cleaned out the carby then tried to start it. no go so i dug deeper took the cowling off and the starter and could check the bottom of the piston . As some one on here in another thread had advised to be done . Scoring of the base of the piston which could mean that it had at some time been run on straight petrol!!! took the head off today and checked the bore same thing. Look at the pictures and tell me if you agree with me that it is a dead engine or a boat anchor. It was a v40 off a silver streak mower. Please tell me if you come to the same conclusion as i did

Thanks Shaun

Hi Shaun,

I haven't had too much experience specifically with scored bores and if they'll start after having been scored. What I will say is that if you have compression on both sides, you should be ok, even if it means you need to hone a little and possibly get an oversized piston.

How long has that engine been sitting idle? It looks horrible inside, like it's bone dry and been left to the elements. First thing, before you do anything else please lubricate the inside a little before further rotation of the internals.

Are you able to send a pic of the top of the cylinder, with the focus of the photo being closer to where the head is? Between the exhaust port and head is where you'll see the most wear, so that's where we need the focus.

Also note, if you do a compression test, wetting the cylinder with oil will change the result compared to when it's dry.

Finally, take a pic through the exhaust port so we can see the state of the rings.

Cheers,

pau13z

If you can't open the heic files, it's because they are apple files and you need a file converter. I got this one and it works..
https://www.copytrans.net/copytransheic/

Now to have a look at the PT.
speedy

I have got some engines with scorring going .
I'd take the piston out and decoke rings, see if they are any good...
Worth a try.
speedy

Hi Shaun, I haven't looked at the pics but if from your description it has been straight fueled and therefore is a very small dingy anchor

Strip it to the bare block, paint it black and use it as an abstract art piece or a door stop!

Hi,

Looks like I'm joining the club. Picked up an almost complete Victa Hurricane at kebside cleanup this morning while taking the grandchildren to school. No blade disc or plug, plug wire and coil. Put known good ones of all three on with a known good carby. It will fire but not run even on starter fluid.. Very quiet. Pulled off the muffler and piston very scored, looks like only one ring left. Straight fueled is my guess. Still get some good parts I suppose. Base is very good but I have no need for them. Starter good.

Not as happy as I was when I first saw it,

Jeff

Jeff when you say it will fire but not run, hoe are you getting it to fire?

When you strip it down, keep the rings if they are thick.......mix and match later on, keep the base....... coil starter. decompressor.... they will come in handy.
speedy

Not to mention the electronic module for use on a FCSP which ate prone to failing. I got one going that way thanks to NormK's advice.

Hi Norm,

I fueled her up with a known good carby, coil, plug lead & plug. It does fire but just a few times and stops. Its strangely quite. No better on starter fluid. Looks like straight fueling to me. Very scored piston and it had brown discoloration in the crankcase when I took the starter off. Well it was just a kerbside pickup. Good starter, LM carby is all there, and I need some springs etc, Good base and catcher, I can not really com[lain.

Thanks
Jeff

Jeff the fact it fires a few times and stops means it could be ok in the top end, sort of sounds like it is not sucking fuel in, top seal ok? if not it might be a bottom seal, I haven't had to replace one yet, so it is not a common problem. BTW I hope to pick up a 24 with a PT on it in the next few days, then we can compare notes.

Thanks Norm,

The PT 24 will be interesting.
Should be the VEX 60 5hp motor if its original. Straight manifold etc.

All the best
Jeff

Hello thanks for all your thoughts on the power torque engine of mine i have some further pictures and it ain't pretty . One picture is of the view through the exhaust port . See what you think
Seems like i have started a lively discussion . I think that i will turn it into a display motor.

Shaun

Be careful taking rings off. Clean groove out with an old sharpened broken ring.
Give a light hone of the bore just to get bad lumps off.
I've got engines like that going. Worth a try.
speedy

I agree with speedy.

Also, to fully gauge the damage internally, you need to remove the head. If you're to restore the engine to working order, you need to do that anyway. Disassemble the block; remove the head, conrod & piston, and crank. Hone the bore lightly, change the piston & rings, see how it goes. If it's really bad and you can be straight and accurate enough, you can hone a little more, and replace the piston & rings using oversized components. Remember, you can always take more off but you can't put it back on.

If you don't have a hone or other tools to accomplish this and don't want to spend the money on them because you won't do it often enough, you can either take it to someone to rebore, just leave it, or sell it.

Cheers,

pau13z

And the O/S rings/pistons are cheaper than standard obviously because nobody is rebuilding/reboring them except for a few of us here

Hi,

I pulled the flywheel off the kerbside pick up one yesterday. The flywheel had the toothed ring around the outside which I guess must be for an electric start, but this machine was normal start. I have never seen a complete electric model. Where do they mount the starter? Charge the battery from the magneto I suppose. The piston looks very similar to the OP's pictures. Looks like this was just a collection of bits & pieces that someone put together hoping it would go. Ah well you can not expect much for nothing.

Still got a good starter, a flywheel and the carby is all there. Muffler fell apart on removal.

All the best
Jeff

Jeff I have a heap of those starters, never had the heart to throw them out and never tried one to see if they work. I just make up a blanking plate to cover the exposed tooth section where the motor bolts on. 2 screws hold the motor on. Battery is charged by external charger, not by the motor. At least they kept the pull starter, not like some of the new models that are electric start only, really dumb idea. A good pull starter is always a good win, plus carby,coil module and other goodies. Never know what you will need in the future, some bits might get hard to obtain one day.

Jeff I have a heap of those starters, never had the heart to throw them out and never tried one to see if they work. I just make up a blanking plate to cover the exposed tooth section where the motor bolts on. 2 screws hold the motor on. Battery is charged by external charger, not by the motor. At least they kept the pull starter, not like some of the new models that are electric start only, really dumb idea. A good pull starter is always a good win, plus carby,coil module and other goodies. Never know what you will need in the future, some bits might get hard to obtain one day.