OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Engines Questions On Victa Two Stroke Engines Victa Twin Cylinder Flywheel

Hi everyone,
I just picked up a victa twin engine and, the flywheel is cracked bad, so im looking for a new one, does anyone have one or know of anyone or anywere where i might be able to get one. Im in Melbourne Victoria and i will pay for postage if its in another state.

Cheers Anthony.

(I think i may be able to weld the flywheel with my mig with some alloy welding wire and suggestions?)

you would be best trying to find a new flywheel. I have two spare running engines, however as well both have some sort of cracking on the flywheel.

I wouldnt reccomend trying to weld it because if it isnt prepared and welded and finished perfectly it will present a major burst hazard.

Thanks for the help joe, are you running your engines on the mower decks or on a stand of some sort?

Sounds as if it is already a major burst hazard, Joe. Welding it skilfully with MIG will probably make it better rather than worse, but no engine with a cracked flywheel should be run. Bursting flywheels kill people.

Since so many of them seem to have the problem, it sounds like a design fault. Making a new, better-designed flywheel is the best solution. There might be a way to save the old ones - shrinking on a steel band around the outside is the obvious way - but I'm not going to endorse that idea without a whole lot of detailed information about the flywheel and the problem.

cheers grumpy, do you know anywere or anyone were i could get either a new or used one?
Cheers Anthony.

how much different are they to normal victa ones? could you possibly post a pic of yours and the damage. i have a few odd victa flywheels laying around that i dont know what they come from so i may have one that fits the build. only problem is they are not at home so i will have to check when i get a chance.
regards jay

Thanks for the help ray, i may get a chance to take some photos tonight. the obvious difference between the two is the the twin cylinder engine flywheel has 2 magnets opposite each side (one for each cylinder)where the single cylinder flywheel only has one magnet.
Cheers Anthony

Above showing the two different magnets on the flywheel.



Above showing the crack in the flywheel, which goes around a little less then half the flywheel.

anthacdc,

I will contact a friend tomorrow that might have a second hand flywheel and let you know what the cost might be.

I am lead to belive that the second magnet on the fhlywheel is more of a counterbalance for the bigger one, both pistons fire at the same time. Wow that one really has let go hasnt it !

Thanks guys, yea joe i was unsure about the crank timming as i havent look inside the engine yet. usaully on other engines the opposite side balencer is not a magnet but just a chunk of steel, but on this one it is a opposite magnet.

Cheers Anthony.

i checked the ones i have and it seems my mind mislead me. i dont have any here and rang my mate who has allot of old victa bits and he didn't have any either. excuse my ignorance but does the twins have 2 coils or just a single. from memory i believe its a single but aint sure anymore. it may need two magnets to generate enough spark to fire correctly seeing as there is twice as much load as a normal mower.
looking at that flywheel ide say you in a bit of a pickle because its ready to let go. the problem is if you hit a stiff object then the sudden strike will likely cause the whole thing to fly to bits. this is because of the force we know of as inertia, that is basically things in motion will stay in motion. therefore its likely that the flywheel will keep moving at high speed even if the crankshaft doesn't.
sorry about no being able to help you out this time
regards jay

Hi to All,
I would definitely agree with the above suggestions. This flywheel could be deadly if used. In situations like this, it is much better to be safe than sorry.
From what Joe has said about his 2 spare running engines and grumpy's reply, there must be a serious design flaw.

However, could it be possible for an engineer to retrofit the 'second magnet' to a standard Victa flywheel?

thanks guys, yea i know that the flywheel is gone, im gonna get some aragon gas for my mig and try to weld it up, doing properly of course. yes mowernut it only has one magneto and coil setup.
Cheers Anthony.

Hi Anthony, even if you weld it up 'properly', the stresses and strain that could be placed on it could still render it unsafe....plus the 'out of balance' condition caused by the weld itself may cause it to fracture again, burst, resulting in severe injury to yourself or others.
Anthony, in my opinion, throw it in the bin, and get yourself a serviceable item.

i think both of mine are stuffed due to corrosion getting into the magnet, having that expand and crack the soft alloy flywheel, I have one really good victa twin wrapped up in the shed, which hasn't been used much in its life and that one is perfect.

I think in the main concept of things, the flywheels design would last the expected life of the machine if cared for properly. However since they are more of a collectors item now many have died years ago. Cheers Joe.