Broken screw on Volvo Penta impeller pump housing

bankofdad

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Agree with the others, just fit a new cam eg. Jabsco 490 Pump Cam Plate for Flexible Impeller Pumps but use a stainless screw. To remove the epoxy just heat the local area with a soldering iron which will soften the epoxy so you can just push out the remnants of the screw. The thread is in the cam so its only a plain hole in the body. Use a drill bit to remove any remaining epoxy. Seal the new screw to stop water leaking.

The Johnson pumps I have come across have a 8-32UNCX8 cam screw so do not assume metric just because the cover plate screws are metric. What is your pump Johnson model number?

Www.solocoastalsailing.co.uk
Thanks its a D1-20F engine, unsure of pump number as not on boat at mo
 

Plum

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Thanks its a D1-20F engine, unsure of pump number as not on boat at mo
A quick search gives a Johnson part number for the complete pump as 10-24751-01 which is a F4B-903 model.
Individual part numbers of cam and screw and copper washer are shown below. The screw is shown as a 8-32UNCX8
Screenshot_20240528-195229.png


Screenshot_20240528-194818.png
 
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