spikeman Posted August 9, 2012 Share Posted August 9, 2012 I just got done with a two year build (was all taken apart) on a 1916 model 75 Willys Overland and need to know the firing order on the 153.4 cu. in. engine. The books I have tell me nothing.........It fires off a magneto and I know which is number one.....some help here Link to comment Share on other sites More sharing options...
Layden B Posted August 9, 2012 Share Posted August 9, 2012 How about take out the spark plugs and hand crank it around. After #1 comes up on compression the next will be #2, etc. Link to comment Share on other sites More sharing options...
Guest Al Brass Posted August 9, 2012 Share Posted August 9, 2012 Most 4 cylinder engines are 1-3-4-2. An alternative would be 1-2-4-3. Give the first one a try and see what happens. The valve positions would confirm it by finding TDC #1 (#4 valves will rocking) and turn the engine in the correct rotation 1/2 a turn. Note which valves are rocking then. If the valves on #2 are rocking, it will be the first firing order quoted above, if #3 valves are rocking, it will be the second firing order.Hope that helps.Al Link to comment Share on other sites More sharing options...
Guest prs519 Posted August 10, 2012 Share Posted August 10, 2012 Was it not Overland that had an uncommon engine rotation? Whichever that is.? Clockwise from the driver's seat? I think? Link to comment Share on other sites More sharing options...
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