I have an 87 JD-850 with preheat feature. I just turn the key left for 15-30 seconds and start normally. Rarely use the feature unless it is really cold, which in Texas is below freezing. Starts easy every time with using the preheat feature. I do not have the decompression feature on my tractor. The tractor is almost 30 yrs old and the only maintenance issues is replacing the battery at 17 yrs and replace a fused link to the starter at 18 yrs. If you don't abuse the two stage clutch and changed all the filters and fluids on schedule it will be bullet proof. Just wish mine had some remotes. JD no longer stocks the conversion kits and I haven't been able to find a kit for mine. Good luck.
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Today's Featured Article - Diagnosing Engine Difficulty - Diesel Tractors - by Staff. The following suggestions are listed for your assistance. You can make simple adjustments on your tractor that will improve its operation and save you the time and expense of hiring someone to do it for you. Always make one adjustment at a time, and if the adjustment made does not improve the condition, return to the original setting before proceeding to the next adjustment. Hard Starting Cold air temperatures. Insufficient fuel.
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