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What have you done today with your Austin Seven
A week or two ago, having picked my stepdaughter up from work, I limped home in the ORT and just made it onto the drive before the engine died.

Removing the float chamber to check for crud, I noticed the fuel level looked a bit low. I tried the pump priming lever and concluded that the superglue repair on a cracked casting to stop an air leak had given up after several years service. This evening I finally found an hour to dig out a spare pump and change the diaphragm for one that's ethanol resistant. I rebuilt one previously, but in a moment of weakness sent it to a chap in Spain. 

 Now there's been a fair bit of chat about the strength of springs, so I thought I'd try to compare the yellow painted spring in the new pump with an old one from a pump that failed previously due to leaky valves.

The yellow one looked a bit thicker but felt the same, so I started to think how to test both to see if the spring constant was the actually the same. I thought about weights and measuring heights, but quickly realised there's an easy approach to most things...

   
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Messages In This Thread
Peak District well dressing - by Tony Griffiths - 31-08-2019, 05:00 PM
Genuine old and imitation new - by Tony Griffiths - 01-07-2021, 03:37 PM
Crankcase machining - by Chris Garner - 29-08-2023, 08:59 PM
Massed ballon landing and A7 - by Tony Griffiths - 03-09-2023, 08:27 PM
RE: What have you done today with your Austin Seven - by Nick Lettington - 26-06-2024, 12:15 AM
A beautiful evening drive - by Tony Griffiths - 19-09-2024, 10:16 AM
Popping and not pulling well? - by Biddlecombe - 10-04-2019, 03:37 PM

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