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Want to Buy Mac cat 839 won't start

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Algee

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Joined
May 26, 2020
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Hi, I'm having problems starting my Mac cat839. It's about 20years old but only done around 20/30 hours work. I have atripped and rebuilt the Walbro carb with new diaphragm etc. It will start if squirt easystart into the air intake and cuts out after a second or so when the easy start has burned off. I have used neat fresh petrol with no oil but get clouds of smoke when it fires up. Is it possible that the chain oiler is leaking into the crankcase and stopping the fuel pump from working? What is the best way to set the mixture etc?
Any ideas anyone?
I look forward to any guidance.
Thank you and best regards
Al
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