OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Engines Questions On Victa Two Stroke Engines Victa Super 24

That's a mystery why some grip and some slip. I personally think it's a terrible inherently flawed design that works better than it deserves in most cases.

MF, using a file to cut slots in them seems to solve the problem

MF,
the 100% fix for these slipping starter cups is as I said file slots in the cup about every 10mm takes about 10 mins and the starter is better than they ever were new. I have no fear about picking up F/C's with cup starters anymore

That's a good tip Norm, I'll keep it filed upstairs.

Hi Jeff,

I think I have come to a decision on the yellow 24 I have with the PT motor on it. I am convinced that the PT motor on these is not suitable and I would like to fit a F/C on it but my issue now is not having enough pulleys to fit the F/C's Means I would have to make up another adapter plate to take the F/C as well. Think I will just chase 24's with F/C's on them in future

I read that the constant sideways tension from the belt could cause problems even for the FC over time. That means a half crank powertorque would have no hope coping. It's strict purpose is to freely spin a disc directly off the crank -which it excels at.
I wonder how the Briggs and Honda's fare?

Hi

All I can say is I'm having no trouble with my FC to PT conversion so far but it's early days yet. Time will tell l suppose. As far as pulleys goes try to modify an alternator or air conditioner pulley. I'm pretty sure that's what mine is. They are the right belt cross section, just need to find the right diameter. A visit to a friendly car wrecker ( if such an item exists) might help.

All the best
Jeff

Hi Jeff,
The problem with the F/C pulley is that it is a solid pulley with a taper in it to fit the Victa crank. With the P/T the pulley has a step in it because it fits to the standard P/T blade carrier boss which brings it back to the same slasher frame to belt measurement as the F/C's. Anyway it is all a learning curve to find out what works best

Hi Norm

When I was using an FC the previous owner had roughly ground down an FC boss to fit in a recess in the auto pulley. Even though I am not using an FC I machined an FC boss to fit just in case I have to go that way.

Rough as it was it worked OK, no real vibration etc. I am using the same pulley up the other way with the PT.
No idea what the auto pulley came off though.

All the best


Jeff

Had one of these with a PT on it dropped off this morning because they couldn't get it started. Float needle was missing so it had been fiddled with. Then there is the next issue that comes with PT's on these, heap of crap compared to the F/C's, the F/C's are such a better motor for this purpose. The PT's are problematic to start and kick back, require several pulls to get them started. Once running they are fine but are a pig to start. A couple of times I have taken the motors off and put them on a standard base and they work perfectly, but put them back on the 24 base and they turn into a pig again. Don't understand what it is all about.
It would be interesting to know how many of these Victa sold I wouldn't have thought big numbers because they would have had so many complaints about them, they really are a bitch of a machine, quite happy to never see another one of them. Problem is I can't start swapping them back to F/C's as it requires too many parts and motors are getting in short supply.
I'm also thinking about trying to fit a manual decomp to try and reduce the kickback

Hi Norm,.

I reckon the PT 24's are OK
Just need to give s decent pull not a half hearted pull. They go like a rocket. There is a starter issue but only usually when flooded.

We are going to stick with the PT even though we now have a good FC to put on. FC s are hard to come by around here. The. 24 may not be sustainable if we have to rely on FC s.


I'll be very interested in your low compression idea


Jeff

Hi Jeff,
The PT motors are fine on them if you can get them started. The kickback has nothing to do with how hard you pull, they njust lock up to a dead stop, exactly the same if you try starting one without a blade carrier or a loose one. I have now had a few of these with PT's on them and everyone has been the same with this almighty kickback problem. I am firmly convinced it is a decomp problem, I have no idea why it only occurs on these and I am still trying to find a solution. If yours is working fine that is fantastic, just wish I knew why.

I think the Powertorque I'd the ultimate one purpose engine specially developed for it's original task: to drive a flywheel of a certain mass directly and nothing else. My theory. FCs were used in more applications.
The Powertorque was used in the tilt-a-cut. How were they? Maybe they were slightly retuned as was the 600?

Hi Norm,

Sometimes I think you can overtighten the belt. If it's too tight it's hard to pull over. Must be the PT starter if it's not an issue with an FC.

Our PT 24 with just a cheap automotive fan belt has done 12 months mowing on half an acre of Kikuyu although there was a drought in the middle with very little growth. No obvious belt wear.
Jeff

Norm

The real PT 24 engine was a special engine. The one I am using is off a PT utility. It's s great engine seems to have more go than standard.

Jeff

Hi Jeff,
Not sure what the difference is on as you say a real PT 24 engine is unless they played with the jetting and compression. I have swapped around several of my motors here and they all do this kickback carry on, bizare, just getting me angry because I can't understand it. I have tried with loose belts,tight belts every combination I can think of. I now have this one hopefully working reasonably well by swapping a few decomps in and it seemed better. Will test it again today and see how it goes. I can't be the only one having this issue with these. One part of me says don't ever pick up another one and the other part of me says to get more and see if I can come up with a fix.

Sounds like it is a decompression issue. Electric start maybe.

Mine does kick back but it's not very savage and only when flooded. I think they are worth persevering with. PT s will be all we can get soon.

Jeff

G'day Norm,
Just a speculation here, but it wouldn't surprise me if the Super 24 PT engine had a heavier flywheel than the direct drive mower PT's.

You might want to check the part number/s...

Just checked a parts diagram - flywheel on 88/89 super 600 is same as the regular commando/bronco/standard 2

They do have a different jet

CR03522a - Tilt a cut
CR03655a - super 600
cr03685a - pro 550
cr03522a - Bronco/Rapier

This could be more the difference in v35/v40 engine packs though

I think I can figure why the Powertorque is kicking. The gear reduction effect effectively reduces the load on the motor and the PT is just extra prone to kick backs maybe due to higher compression and/or their decompression valve, being a different design to the FC one, just isn't as effective in this situation.

Also the pull start mechanism might let you physically pull the motor over faster than the FC allows you to, especially the side pull version which has a gear reduction itself for less effort on pulling the rope.
Maybe the key is don't pull so quickly as you might otherwise want to.