BOBWhite Posted 5 hours ago Share Posted 5 hours ago Educate me on hand primer pumps, are there different thread sizes? I have a few older pieces of equipment with the old "unscrew and pump" type and would like to replace them with the "black top" type. The old style probably would work if I put new seals in but I prefer the newer type. Thanks Quote Link to comment https://www.bigmacktrucks.com/topic/76337-hand-primer-pump/ Share on other sites More sharing options...
The Heinz Posted 4 hours ago Share Posted 4 hours ago I think the primer pumps are the same size, I haven't run into a situation where someone had one that was different. Here's a visual of the pumps from PAI that I use for customers all the time; number 11 on there seems to be universal. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76337-hand-primer-pump/#findComment-589511 Share on other sites More sharing options...
mrsmackpaul Posted 2 hours ago Share Posted 2 hours ago This style tend to come undone Or at least thats what I have found anyway Paul Quote Link to comment https://www.bigmacktrucks.com/topic/76337-hand-primer-pump/#findComment-589517 Share on other sites More sharing options...
Freightrain Posted 38 minutes ago Share Posted 38 minutes ago I swapped the old lock down style for the screw down version in my 300+. No issues. I did end up buying a screw down model as things are tighter around the pump on the 300 and that bailing ring would be a nuisance. I never needed to pump it, the original pump was broken and I just needed something to screw into the transfer pump. Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/76337-hand-primer-pump/#findComment-589528 Share on other sites More sharing options...
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