Posted by Janicholson on September 11, 2014 at 09:09:25 from (199.17.6.37):
In Reply to: 450D operation? posted by thdrduck on September 11, 2014 at 05:15:38:
As noted, the compression release provides about 5 to one compression for gas starting and warm up. The compression relief valves allow compression pressure to go into a separate compression chamber with the spark plug in it. When in Gasoline mode, the intake manifold air intake is closed to raw air, and a separate runner system sucks through the small carburetor. There is no "throttle" in the carb, it is small enough to run at a fixed opening. When switched to diesel after about one minute when in summer, or 3 minutes in winter, the air is redirected to pure air, and the mag or points/coil is shut off, and the compression reliev valves are shut. Jim
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