H2 timing gear question (1 Viewer)

Jan 7, 2021
Hi, Newbie here, I have just downloaded the H2 engine repair manual to verify the timing marks on an engine I am working on. The picture in the manual shows 2 idler gears and the engine in front of me has just one idler. my question is, are there early and late variants of the 2H engine or is the one I am working on some other model. I ask because I need replacement injector pump and dont want to get the wrong one.
Any help from the gurus would be appreciated.

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