No expert but I'll give it a shot. WD40 has saved me many a headache with seized engines. Take ou the plug and give it an almighty squirt down the plug hole for a few seconds. Stand the donk on its nose, head facing to the sky and let it sit over night.
Next day try and turn her over just a little, backwards and forwards - any movement at all and you're making progress. Repeat the process for a couple of days. I've had success after one night and also after as long as four.
A lot of guys have their own opinion on which fluid to use - everything form molasses to diesel, but WD40 always done the job for me.
Once you've got movement in the piston, remove the head, then WD40 the hell out of the barrel nuts. They are dry mounted so rarely give any grief.
Once the barrels away you'll be able to give the conrod a bloody good pull/push to see how much play there is. Also rotate the crank and listen to how the bearings sound.
As far as seals go, if the bottom seal is shot, there will usually be an almighty mess on the lower crank case half. Another check you can do is rotate the crank before dismantling for a compression test. You should hit two points of resistance on each rotation. The second weaker point will indicate how well the seals are performing - no resistance and it's time for new seals. Seals are still obtainable but watch that you get the correct internal andexternal diameter correct. The guys at Outdoor King will help I'm sure - just message them on the website.
Bearing sets can be found quite easily. FarmerJ on ebay does them.
As I said, I'm just a tinkerer, and there are plenty of experts here that would disagree with me but that's my 2 cents - hope it helps.
Last edited by bestseller; 09/01/16 05:04 AM.
