Guest AusyTim Posted July 31, 2017 Share Posted July 31, 2017 Hello everyone Upon pulling apart the oil pump on my 27 Buck Master 6, i found that the gears are in need of replacement. I have another motor from a 1925 model, and was wondering if anyone knew if they are interchangeable? Many Thanks Tim Link to comment Share on other sites More sharing options...
ROD W Posted July 31, 2017 Share Posted July 31, 2017 AusyTim 1925 and 1926 both have the same part numbers for the oil pump, as per my parts books. 26 and 27 motors are very similar, so I would say they are interchangeable. Link to comment Share on other sites More sharing options...
Leif Holmberg Posted July 31, 2017 Share Posted July 31, 2017 They are interchangeable 1925 -1928 Master Leif in Sweden. 1 Link to comment Share on other sites More sharing options...
Guest AusyTim Posted July 31, 2017 Share Posted July 31, 2017 Awesome, thanks guys. Link to comment Share on other sites More sharing options...
26-25Buick Posted July 31, 2017 Share Posted July 31, 2017 Tim, A few lessons I just learnt doing up my 26 pump. Make sure that the plate at the bottom of the pump is flat and the gears are flush with the bottom of the pump casing. A few thou out seems to make a big difference. Also check the relief spring as my spring was broken and had worked its way back in to each other, shortening the spring by about 3/4". Check the pin at the top for wear as well. I'm told you can bench test your handy work with a pressure gauge and a drill if you have one but I didn't have the fittings to do it. These relatively small fixes saw my pressure go from running 16-18PSI and dropping at temperature to a healthy 34 at idle to 36 at speed. 2 Link to comment Share on other sites More sharing options...
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