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Fuel tank breather

Fuel Tank Breather

I have an XK 150 FHC (835140 Now RHD) which has a problem with a very slow filling fuel tank. I think the lack of a breather pipe is the issue. I can find no evidence of any breather pipe connection in the fuel filler area although there appears to be a blanked off pipe (about 1/4 inch) inside the neck of the fuel tank. Does anyone have any ideas as to where the breather pipe is meant to be or any modifications that could be made to remedy the problem? Many thanks - Roger Herrick

Roger, The 140 and 150 tanks have an internal vent that protrudes into the tanks filler neck, the other end ( the tube is about 6" long) terminates at the uppermost, leading edge, of the tank. A tank without this tube, or if the tube is blocked( perhaps by sloshing compound?) will burp back when filling, unless you fill cautiously and slowly. You should be able to retrofit an external vent tube,( thats what the 120s have)or try to unblock your tube.You will probably have to remove the tank to safely fix the problem. - Regards, Wray Schelin

Roger Herrick -- You need to look at the XK150 Spare Parts Catalogue, which will detail the vent for the tank -- including a plate (drawing) that points out exactly where it is. If you don't have the book, perhaps someone on this marvelous list does and can find/send you the info. Hope this is helpful - Larry Martz

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