What generation HPMX do I have?

[I Ride Dirt]

How do I identify a first generation HPMX 44? The only casting # I see on them is 11011.[/b]

[mudbucket]

If they have the cold start plunger assemblies they are 1st gen

2nd gen does not have plungers but still has the block off plate

3rd gen is cast solid and has no block off plate

Not sure but I think the first digit on the serial number also depends on generation, 1 being first, 2 being second and 3 being third

[I Ride Dirt]

Thanks!

[paul_f]

That is useful, thanks. Do you know approximately what years the different generations started?

I wish to purchase some, and I imagine some may have sat on a shelf for a few years