Martin66

Still in the same boat, will fire on starter fluid but won’t draw the fuel through, really puzzled in where I’m going wrong.

Went round everything and tightened it all. We have fuel to the plugs now as we just flooded it, so going to leave it a while and try again later. 

The float chambers and both full with fuel. Also the float valves move up and down freely as do the pistons. The only thing we don’t know is if the jet is set up correctly in the piston. Waiting on the special tool to arrive. Is there a correct set up sequence to follow? Also would this stop fuel getting up there?

Hi Rob, Thanks for your reply, to get the engine started it is by forcing fuel through the carb / inlet manifold. So engine will fire up for a few seconds until that has burnt that fuel off. Dosn’t seem to be drawing fuel from fuel chambers up through the main jets. Carbs have been thoughly cleaned out in special cleaner system and rebuilt, so still may need that fine tuning, but unable to do so as it’s not running long enough. Back at home so I can call you if need be to have a chat Cheers, Martin                    

Hi All, Have been putting back together a GT6 Mk3 over the last few years. Got to a point of starting up the engine only to find things not quite so good, so over the winter months removed the cyl head  only to reveal that the head gasket must have blown at some stage in its prior life out on the road. ( some 14 years ago ) Have had the head refurbished by a local company in Pitstone, and now back on the engine ready to fire up the engine. Good news is that the engine will fire up and run few a few seconds having floaded the carbs with fuel, then cuts out. we have fuel feeding the carbs all ok but obviously not further than the float chambers. On removal of both chambers found that the needle valves were sticking. Removed and recleaned ok so that they were free to move up and down.Again after initial flooding the carbs the engine starts up ok but soon runs out of fuel.Unable to see if fuel is getting past the main needles ! Even if the main needle jet is adjusted incorrectly surely the engine should run ! and then adjust eliments of carb as required ! Any ideas would be great fully received . I can also be contacted on my Mobil 07756-442160 Hear from anyone soon, Martin            

have loaded 2 photos of the linkage rod between the 2 carbs which have gone into my gallery. However when the long link is in position, their is no movement for the throttle ! as if the link rod should be some 1” longer. The link rod i have is 3.75” long Hear from you soon, Cheers Martin

Progressing with a rebuild of a dismantled gt6 mk3 Have positioned both carbs in place but having problems with the linking of them both !!! Is their any body with a Mk3 that I can take a closer look at so that I can get a gist of the set up, I appear to be 90’ out and hence the throttle is too tight  I live in Berkhamsted Herts Hope to hear from anyone soon Cheers, Martin