I’m pretty sure I’ve seen a list of the 3300 generations 1 2 3 and 4 serial numbers but I can’t find it.

can I get some help please.

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I think I've seen a list with the cut-offs for each "Generation," too, but I can't find it.  However, it's more useful to see exactly what was changed/upgraded by serial number.  For instance, my 3300 was built during the transition from "late hydraulic lifter" (which I suppose is a "late Gen 2") to the "Gen 3," so it has some but not nearly all of the Gen 3 improvements/upgrades.  Those changes by serial number are on the last few pages of the Overhaul Manual:

Gen 1-3: https://jabiru.net.au/wp-content/uploads/2020/10/JEM0001-22_Overhau...

I looked at the Gen 4 Overhaul Manual but I don't think it has a serial number change list yet.

John

N750A

Thanks

I looked a little further and found that one of the members of the JabCamit group on the Groups.io site posted this - I think the information is also from the Overhaul Manual:

Solid lifters (Gen 1)
• 2200 and 3300 engines earlier than serial number [22A-2068] or [33A-961] utilise solid lifters driven by a 330° camshaft.
Hydraulic lifters (Gen 2)
• 2200 and 3300 engines from serial number [22A-2068] or [33A-961] use hydraulic lifters.

Roller Followers (Gen 3)
• 2200 and 3300 engines from serial number [22A-3596] or [33A-2539] use hydraulic lifters with roller bases

Gen 4 engines start with 22A3811 and 33A2770 according to the Gen4 overhaul manual

John

That’s it thanks John

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