OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Engines Questions On Victa Two Stroke Engines Powertorque won't start

Yes Jeff this is the yellow 600, fuel is fresh, I put 4 liters of fuel through it over Easter before it stopped. Same carby and I did think about changing the needle for one of the ones I filed down the other night. So far I have fitted 4 of those and all 4 worked straight up. It is a waiting game now to see if they still work in a couple of months. Another interesting thing is the reject needles I had were all in one container, ones that flooded , fuel out the primer cap and the others that just would not start. Of the 4 I have fitted none have leaked so I am still not sure where I am at. In hindsight I probably should have put them in different containers but at the time I was in no mood to think along those lines, I just wanted to fix them and get them out of my hair.

Hi Jeff,
I fitted a shortened needle and another plug, I got it fired up for a few minutes and then it stopped again, but the really strange thing is it was making a similar noise to the original motor. I think I will pull the motor off again and put another one on and see where that takes me.

Norm,

Its not the bearing in the blade disc spindle is it? Any play/noise there when spun by hand?

About all it could be for the noise to continue over two engines. Very loose blades, or bent blade disc perhaps but I doubt it.

Very interesting.

All the best
Jeff

NormK, have you tried fitting these motors on an 18 inch deck, complete with blade carrier and tested them out?

Hi Jeff I forgot to mention, the noise only comes in when opening the throttle from idle and it is a knocking noise, but as soon as the revs come up the it runs fine, as did the previous motor.
Yes MF this second motor I put rings in and ran it on the original base and I didn't hear any strange noise then

Hi Norm,

Some motors do have a knock in them. I always thought it was gudgeons or something. Its intermittent too.It doesn't matter.

Maybe a flat /hard spot on the belt. Try another belt maybe Those automotive belts are cheap enough. Other than that I have no idea.

Sure is an interesting case. I hope you do not have anybody waiting to pick this one up. Has to be someting in the frame, base, pulleys , spindle belt or blade disc. Not much left to try is there.

All the best
Jeff

Hi Jeff,
I'm wondering if it might be a PT thing being only supported on the bottom side. Maybe if I increase the idle it may not cause the issue. Never heard anything like it with the F/C's. No problems time wise, nobody wants a mower now, at least not till September/October

Hi Norm,

I don't remember any knocking noise in my PT conversion to the FC 24. It was a bit of a noisy muffler so its not easy to tell. There is a slight belt whirr maybe because the automotive fan belt I am using has the cogged profile in the Vee.

It might be worth having a look at the spindle. In a well-worn 24 like mine, the sides of the vee are showing quite a bit of wear so there is a definite lip on the pulley from the belt. I was a little worried about it because that is one part you will not get. It does not seem to cause a problem though.

Good luck,
Jeff

Hi Jeff,
I had another look at this slasher yesterday, a couple of pulls and it fired up. Knock was still there so I increased the idle a little and that seemed to have gotten rid of most of it, still a slight knock if I increase the revs quickly but it only knocks once and then it is fine. I won another F/C one yesterday but I haven't picked it up yet, supposed to run fine

Hi Norm,

I wonder if it might be worth pulling the starter off and having a look to see if there is any wear marks on the conrod and crankshaft like there was ion the previous engine.

All the best
Jeff