The 420 engine is basically a Deutz copy, and they will run backwards if during a cold weather start the compression lever is operated at the wrong time of the engine rolling over, but as said, pull the decompression lever full up as if its was a cold weather start, pull the starter and try a little bit of leverage against the ring gear. I have had one that had a stuck pilot bearing also, and maybe this backfire did some damage to the clutch area? slim idea on that. but a better description of what the engine was doing at the time of backfire is needed, ie: rolling over, and the decompression was operated? was attempting to start[ puffing smoke], grinding noise heard, starter was noisy/operating is somewhat spurts of power. And when they backfire and run a lot of black smoke comes out of the air intake/exhaust, or any other leak it can find :) so the actual time/sequence is needed? a backfire as said could be a internal failure while it was running hope it helps
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Today's Featured Article - Sunday Drives - by Cowboy. Summer was finally upon us here in Northern Maine. We have two types of industry up here, one being "Forestry" (Wood Products) and the other "Farming" (Potatoes). There is no shortage of farm tractors and equipment around here! I have been restoring old Farm Tractors for the past 6 years, and have found it easier and less expensive to hit all the auctions and purchase whole tractors for parts needed. My wife who works at a local school, and only has weekends and summers off, while on t
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