Author Topic: Ew350 non return oil valve  (Read 313 times)

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Offline Neilj

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Ew350 non return oil valve
« on: 23 Oct 2021 at 16:04 »
Evening all.does anyone have the drawings to make the oil valve that goes into the front cylinder or even better one they can sell me.Thanks Neil

Offline cardan

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Re: Ew350 non return oil valve
« Reply #1 on: 24 Oct 2021 at 01:39 »
Hi Neil,
I'm sure I have one spare, but postage from Australia to the UK is a complete lottery at the moment - somewhere between a week and three months (from experience!). But we can try is you can't source one locally.
Cheers
Leon

Offline Neilj

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Re: Ew350 non return oil valve
« Reply #2 on: 24 Oct 2021 at 07:50 »
Thatís great Iíll hold on see if anyone in the uk comes back with one otherwise that would be brilliant.thanks Neil

Offline cardan

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Re: Ew350 non return oil valve
« Reply #3 on: 25 Oct 2021 at 00:33 »
Hi Neil,

After a brief moment searching for the lost tin of oil fittings... I came up with two different non-return valves. The short one screws into a 7/16-20 thread, the long one has a much smaller thread, which seems to be tapered - something like 24 tpi on a diameter of about 0.300".

The long one is certainly DOuglas, as it is stamped with the DK monogram.

Is one of these correct for the EW?

When used on a vintage JAP engine, where oiling relies on crankcase vacuum, there is usually no spring on the flapper valve, but I think Douglas tended to use a very light spring to hold the flapper valve up against its seat.

Leon

Offline Neilj

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Re: Ew350 non return oil valve
« Reply #4 on: 25 Oct 2021 at 08:53 »
Think its the longer one read somewhere the shorter one fits 2 1/2 hp and the long one EW to clear the fins or some reason?

Offline Neilj

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Re: Ew350 non return oil valve
« Reply #5 on: 25 Oct 2021 at 08:55 »
looking at the thread again its defiantly the long one. Thanks Neil