Thread: 350 horsepower tips

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mrbee, do the compression test on the motor, then we'll know what we're dealing with. Until then, all we can do is guess.

For best results the engine should be operating at normal temperature, or until the radiator fan starts. Disconnect the coil and the fuel supply to prevent any danger of explosion, and remove all the sparkplugs. Keep the throttle valve open to the max throughout the operation. Connect the pressure gauge to the sparkplug hole, and then turn on the starter until the gauge pointer gets up to the maximum. Repeat the operation four or five times while writing down the result each time.