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Re: Tractor won't start
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Posted by MrFixIt on August 02, 2004 at 10:46:39 from (69.179.21.81):
In Reply to: Tractor won't start posted by Steve MO on August 02, 2004 at 08:28:48:
Engines require 4 things to run; compression, timed valve train, timed hot spark, air/fuel mixture. Check compression first. Next, try to start it while someone squirts some carb/choke cleaner directly in the carb throat. If it fires, even briefly, then you have a fuel delivery problem; if not, you have an ignition problem. If ignition, use a spark plug tester (any auto store) to verify that the plugs are actually firing. The fact that a plug might fire outside the combustion chamber is meaningless. It must fire under compression. Then simply test for spark all the way back to the distributor. If a fuel delivery problem, remove the carb carefully and verify that the float bowl is full. If not, there is an obstruction between the tank and bowl. If the bowl is full, the carb has to come apart. Damaged float needle/seat, incorrect low/high speed adjustment, wrong float level... all have to be checked. If the carb and/or manifold have been off, check for vacuum leaks. TheRealRon
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