Fuel Taps

[john-e-w]

Does anyone know if these motorcycle cork washers fit the fuel taps on a Monroe Mk3 Villiers 15 engine

Ewarts Petrol Tap Corks for AJS Ariel BSA Matchless Norton Triumph

Regards
John e-w

[andyfrost]

Yes , all conventional Ewarts taps fitted to Villiers.

Andy.

[john-e-w]

Having looked on U-Tube how to take the tap apart I copied their idea and replaced the cork washer. However, when it came to reassembly the inner shaft was not long enough to be re-swaged over – so I had another idea – thread the shaft and “pull” end – as I didn’t have a small enough metric Tap & die, I used a 4BA on both halves – fitted a treat (see sketch). The advantage is that it can be easily removed and a new washer fitted at anytime.

Attachments:

1. 

[sidevalve5]

Hi John,

It looks like you have fixed it. This is my experience of them.

Over the years have had several leaking Ewarts fuel taps. Did once get some replacement corks, but they were poor quality, still got leaks. Have tried PTFE tape, nitrile cord, soaking the original corks in an oil/paraffin mix. Nothing really worked. Have had a couple of taps where the threaded spindle with stop end had seized and then saw on ebay a chap from the USA selling an O ring kit. They worked really well, so I took the dimensions of them and then got some from a UK O ring supplier. They were FKM (Viton) Brown 75 ShA at 4.42mm ID and 2.62mm Cross Section. To fit use plenty of lube, fit 4, but if tight fit 3 and put in a small standard O ring to take up the gap. They have cured the leak on every tap I have fitted to them to, the operation is smooth as well. They cost pennies. But you have to get the correct sized O rings, or they may not work.

Best wishes,

Grahame

[andyfrost]

John , all I will add is , whatever method you use is to aviod E10 fuel at all costs , the modern corks will just not last with it , also stating the obvious is to never let them run dry.

Andy.

[Author]

Posts