![]() Just my preference to take care of mine like this, others may disagree, but after seeing a crankcase overflow with gasoline, I take no chances, not cheap to re-build these, even worse after it has a catastrohphic failure.ģ.) Keep the oil clean and change it regularly. To me, even that little left in the bowl if you let it run out of fuel, while your running the tractor, it could possibly leak down, cumulatively contaminating your crank case oil over time, which is why I take no chances and know the oil is clean everytime beacuse I drain the bowl. It happened to me once, and it overflowed the crankcase out the dipstick tube, glad I detected gasoline in the oil before running it. This is important, gasoline thinned crankcase oil will cause these starting engines to fail quickly, always check the oil level and make double sure it's not thinned by any gasoline, smell and feel the oil. I'm not sure what inside that zenith carb causes this, I'm sure this was not so prevalent when these were new, other models are suceptible as well, but as things age who knows, that carburetor is quite simple, easy to clean out and rebuild. If you let it run out, the bowl still has some fuel in it. You can also let the starting engine run out of fuel, shut off the valve at the sediment bowl, but I prefer to drain it, because it takes too long for the starting engine to run out and I know the bowl is dry, meaning NO gasoline can leak down. Solution: drain the carburetor bowl, on the Zenith carburetor, there should be a threaded hole at the bottom of the bowl, take the plug out, install a petcock and use a long hose to safely drain off the gasoline after the diesel is running. ![]() These are old technology splash lube, high rpm (for that era) 2 cyl flathead motors that require you to remember a few simple things if you want them to last and perform as designed, and they do the job if you take care of them:ġ.) Diesel engine must be engaged when the starting engine is running so it has coolant circulating through it, or it will eventually overheat.Ģ.) Fuel contamination of crankcase oil: If the carburetor leaks down, from the bowl, it can literally fill and overflow the crank case oil, assuming the sediment bowl valve is left open so it can drain from the fuel tank. When you have cold temperatures you have a little longer, but it won't be long before it overheats without coolant circulating. There is enough of a safety margain to get the starting engine running, and warmed before engaging the clutch to the diesel and so on, but for anyone new to these, something you need to know. The water pump is powered by the diesel, the diesel has to be turning for the water pump to circulate the engine coolant, through the starting engine, do not run the starting engine without the diesel engaged, unless it's for a short period of time. In Reply to: D7-3T pony motor posted by Grayhead on Novemat 04:51:12: Crawlers, Dozers, Loaders & Backhoes Discussion Board ![]()
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