OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Engines Questions On Victa Two Stroke Engines Full Crank Engine, Super 600

Hello, and thanks for a great forum.

I have pulled down the engine of my newly acquired Super 600, which I am happy to say is in quite good condition and seems as it was reasonably well cared for.

It had starting issues so cleaned the carby and went through checks as outlined here in the archives, but still had issues, so decided to check the piston, rings and bore, mag, module and seals. Even though the piston rings and bore are in fairly good condition decided to replace with a re-bored barrel and piston which I bought from an acquaintance at a very cheap price, (can use original for another Power Plus that needs it). The bottom end seems in good condition so I will leave that alone.

1. How important is the muffler that go's with the high compression head? The Super has HC head but standard muffler as does the Power Plus. According to my research of the archives the HC head is supposed to have the muffler with the extra holes drilled in the baffle and denoted by a hole drilled into the outlet.

2. As careful as I've tried to be I am worried that some of the cleaning etc. may have contaminated the bottom end. Could I flush out with Kero or diesel, blow out and squirt a small amount of 2 stroke oil near the bearings before assembling the top end?

Will get to carby later.

Regards,
Bushie.

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Hi Bushie, a bit of diesel, a thorough clean, blowout and a little oil around the bearings prior to assembly would be a good idea and definitely wont hurt.
As for the muffler i've never run a HC engine with the standard muffler, or vice versa but have heard of others who have and they claim they can't notice the difference. My only concern would be around having the right back pressure to help with pushing back the fuel rich emmisions for a "second" burn. Generally speaking these engines aren't too muffler sensitive and will run irrespectively but i'm unsure of the long term effects of that.

Thanks heaps for your reply bigted, I was really frettin' about stuff in the crankcase. Sounds like I should get the right muffler for her though, as she'll be a keeper.
Now that the frame pulled down so much I've decided to keep stripping, clean and paint, as time permits.

Cheers

Hi Bushie,
To save you the trouble of having to use the 'File Manager' to upload photos, we now have a forum 'Inline Uploader' that allows you to post up to 10 photos at a time.

Instructions for using it can be found HERE
Hoping this is of help,

Thanks Deejay.

Chris125 Might I ask what you used to polish the head in thread:

https://www.outdoorking-forum.com.au/forum/ubbthreads.php?ubb=showflat&Number=55513#Post55513

I also wish to get this engine to best performance with out compromising durability.

If anyone else would like to advise on polishing heads and exhaust ports would be most welcome.

Had a go at a full crank head, didn't want to start on my head off the 600.



I gave it a soft steel wire brush out to get rid of the carbon, then used emery down to 240.

Where should I go from here?
Should I take out all marks/imperfections such as the one about 1-2 o'clock, right up near the machined edge, then polish with something?

Cheers.

I stripped and painted the frame, to give those parts plenty of time to dry, before starting on the engine. Was hoping for a reply to the above but went ahead anyway and polished the HC head down to 400 wet & dry.



Pretty happy with the result, but any further advice would be appreciated. Have now started polishing the exhaust port and tidying up the inlet port up. Oh, and sanded the machined part of head to 250 on glass.
Some further questions:

What is the best way to clean the outside of the crankcase and between the fins on the alloy head?

The foam between the petrol cap and the washer part has all but disintegrated, what do I replace this with? Ordinary foam?

Cheers,
Bushie.
edit: Didn't realize I had posted the same picture below

G'day Bushy,
I think a lot of mower people go under ground in winter as the grass isn't growing.

Your HC head looks great, I normally just remove all the carbon, make sure I have a good mating surface and they run fine, I have cleaned them up before better than that, never done one as nice as yours above.

To clean your alloy head, look at this thread for a start.
https://www.outdoorking-forum.com.au/forum/ubbthreads.php?ubb=showflat&Number=30664

You can look at more threads on cleaning on this site.
I normally google what I'm after and click on the outdoorking link, I find this easier than using the search option here.

For your petrol cap, you would have to use foam that wont be affected by fuel.
Try to get a another cap at the tip shop or mower shop.
Leave the foam out, if you don't over fill your long range fuel tank, fuel wont slosh out of the cap.



To answer one of your questions above, I have put a normal muffler on a HC engine and it starts and runs fine, that's if you cant get one.

Please keep sharing your images and experience.
Enjoy

Thanks greatly for your answer Mark. I was hoping you would chime in as I see you have an affinity with the "Super". Also I share a liking for "full crank, side starters, electronic ignition and decompressors", though may be bias, as this is the first one I have done so much work on.
This is one of three FC's and the next one I want to do similar to what you've done with the yellow side throw in this thread:

https://www.outdoorking-forum.com.au/forum/ubbthreads.php?ubb=showflat&Number=42647#Post42647
My side throw is an oldie though, better check with the restorer/collector guys first!!

Yeah, should have realized a lot of mower people have hibernated... lol.

With the head, figured the 'shinier' it is the harder it would be for carbon to build up. Still not as good as Chris125's though. The exhaust port is coming along well too, but wish I had a Dremel.

Have read the thread you referred to, and others, but harsh chemicals and blasting are out for now. Noted to Google then go to ODK, good idea. Thanks for your other tips.

Started cleaning the outside of the crankcase today and my blue atom is a 'rust' atom and held in by a rusty little bolt.... Could this be part of my original starting problems?

Cheers, and thanks again Mark.

Here's a look at the exhaust port.



Ground down casting marks and polished with stones and various other bits of 180, 240,320 and finished with 400. The foreground is not as good as this pic looks, with the light reflection, but the barrel end sides and the 'dip' is a fairly good representation. Looking into the bore you can make out the cross hatching, if that's a term, of hand (three finger) honing, as I don't have a honer yet.

Below is the inlet.


Just used a small stone to remove some casting irregularities and 180 grit. couldn't get into the sides of barrel end very well, a Dremel is definitely on the list before attempting another.
Heat proof painting didn't adhere very well, probably due to final clean with turps instead of metho. ??

Comments welcome, including critical analysis, as trying to learn here.

Cheers.

Hey Bushie,
I am not the guy to ask about porting, as I normally just scrape away all the carbon in the exhaust port and pretty much clean the inlet port.

I have read and since forgotten about chamfering the ports on the barrel side after your work, so that the rings wont catch. Cant give you any fine details there.

I have honed quite a few 2 stroke bores now and am due for a new set of stones.
I use the 100mm 3 stone honer from super cheap as it clears the transfer ports.
I set the spring pressure as light as possible and using my drill in forward and reverse try for a 30 deg cross hatching.

From what I can see you bore isn't scored and looks good.

Just read about your atom ignition module, if your bolt was rusty, this could have been an earthing issue, once you clean it all up, the end result your after is a series of blue sparks across the plug gap when you turn it over.

I have the metal ignition modules on mine.
Cheers

looking good Bushie your on the right path ,as Mark has said most mower people go under ground in winter,I sure have been getting big frost and down to -7 in the mornings am in firewood mode lol...

Appreciate the input Mark and Chris.

Must get a 3 stone honer one day Mark. This is a re-bored cylinder that had been sitting for a good while, just had a little surface rust which has been cleaned up with emery in a (supposed) cross hatch.
Scored a couple of used modules yesterday, in far better looking condition than mine, so one of those with a brass bolt should do the trick.
Oh yeah, do you recall the thickness of the foam in the brackets which clamp the tank? Mine had none.

Chris, do you reckon you got more torque out of your Mustang powerplus mentioned in the above thread?
Did you chamfer the ports on the barrel side, as mark mentioned, on that job? Have read a little on this but not sure of importance. I guess you would at least have to make sure there were no burrs.

Cleaned bolts and painted some little items this morning, also overhauled the decompressor, nothing worthy of photos.
One can see why these mowers held a premium price, I'm almost certain a great majority of the frame bolts, nylocks and the rear axle are stainless.

You must be in a cold part of Qld, our worst so far has only been -2.

Cheers.

G'day Bushie did I get more torque out of the Mustang well to run it seems strong so my mods did help it's a good strong workhorse, but what I did to that Mustang was mild to what I do now days......Should you chamfer the ports yes,for me it's not just to stop a ring catching on a port but also from what I have read the sharp edge of a port can wipe oil off the rings? who knows but sounds good to me so do it for peace of mind.....

Bushie, I have no foam in any of my long range tank brackets.
If you are worried about vibration wearing into the plastic tank, you could put something there.