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I dunno the part number but: Thermostart is a leetle different than a pre-heater! You may check and see what you have first. From the off position, turn the key to the left, it should be spring loaded and require you to hold it in the left turned position. This is preheat (and what it is actually doing is preheating a little bit of fuel that it is fixing to spray into the intake) NOT GLOW PLUGGING the cylinders. Keep turning the switch to the left and you will engage the starter AND the thermostart simultaneously. OR Let off of the preheat (switch returns to the OFF position, then turn to the right [ON] and further right to engage starter without thermostart assistance. The thermostart does 2 things: #1 it heats up a shot of diesel & #2 It squirts that diesel into the intake when you turn the motor over. It's an effective starting aid...not quite as spiffy as ether but definitely safer. See if you have thermostart first...
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