The rest of the pull-start took some getting off as it seemed to be held by eight small bolts that were rusted and rounded off. Then I found that it was siezed on the shaft and I knew I'd struggle getting parts if I broke anything.
Also I didn't know for sure how things were supposed to come off, just general engine knowledge from messing about with car engines and from my motorbike days, so it was a few days while I teased things apart.
I found that the contact-breaker points had broken and this was why the engine had suddenly stopped for the previous owner.
I went to half-a-dozen different motor-bike/lawn-mower repair shops before I found someone interested in looking for a new set of points for me. It took him about six weeks to track some down in Switzerland and they cost £20 but worth it...except the maufacturer has altered the design and the new ones didn't fit!
I had to strip down both sets of points to make one good set out of the various parts!
Anyway, I cleaned up the rest of the engine inside & out. Found that the piston was scratched by the inlet port so I cleaned it up as best I could with WD40 & wet & dry emery. De-coked the piston crown & cylinder head. Once I'd got off as much rust as I could I de-greased the engine and the various covers, etc, then applied Kurust to any steel parts.
If you've not used Kurust it's wonderfull stuff...it kills the rust and turns the metal black ready for painting.
The pull-start return spring was broken in a number of places but my new friend at the lawn-mower repair shop supplied a new spring and I wound it into the casing that I'd got.
During this time I was re-searching various things on the internet. The engine make and model came up with deatils of a 220cc 14 BHP 2-stroke single and Kohler don't have anything to do with them now as they supply only 4-strokes.
But I found lots of links for Vintage Snow-mobiles or Karting/Lawn-mower Racing, etc. There are specialist forums for these and for the Tillotson carb. I even found the maintenance manual for the Tillotson on the web! See the main page for links to most of the web-sites that I found.
Now it was time to start reassembly...
Engine, Fan, Duct-guards removed. Plenty of leaves around!
A bit of rust on the drive pulley and the belt has a nasty groove cut into it.
The top bearing and belt removed.
Ah, this explains why the engine doesn't turn-over on the start-cord! At this point I was very pleased to find that the engine moved a little when I turned the belt pulley by hand.
The pull-cord took some dismantling as was it siezed on the shaft and most of the eight tiny bolts were rusted/rounded. The rewind spring looks a bit sorry for itself!
The dynamo after I'd cleaned it up. The reason the engine stopped was the contact breaker points return spring had broken.
The piston was a bit scratched on the sides so I cleaned it up with WD40 & wet & dry emery. I didn't want to split the crank-case as this is a critical part of a 2-strokes operation.
The exhaust side of the piston.
The piston crown, it's not as bad as it looks, the gunge wiped off with an oily rag.
The hull with the deck stripped off. I've already added some extra struts to the left-hand side as this is where the grand-kids will slide over the side to get on/off. I've also glued all of the internal strut joints & tightened the screws.