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Testing
by Bruce - 03/05/26 03:39 PM
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Joined: Jul 2010
Posts: 210 Likes: 5
Apprentice level 3
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MMMM I wonder if that screw is far too loose? and it should be tightend.? Carby screws should not be that loose! My theory being that if cracking or advancing the throttle to get it to start is actuating the main fuel circuit as there may be too much air getting past this screw if it is part of the idle air or fuel bleed circuit, there fore delaying activation of the fuel into the engine beyond resonable limits.  When the engine fires up does it appear to be rich? i.e. is their black smoke from the exhaust or is it "clean"? This should give you a few clues, but from reading it seems like a lack of fuel  If you find a sweet engine starting point and the screw is still "loose" raid the wife's fingernail paints and paint plenty around the screw to hold it right, this may even stop any other air leaks if this is the trouble.
Last edited by FAST GRASS; 16/08/10 04:13 PM. Reason: half a sleep! brain function low.....
"Quality is remembered long after the price is forgotten"
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Joined: Dec 1999
Posts: 5,426 Likes: 36
Repair Junkie
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Gac, Did you check the 'O' ring on the main jet (it is under the idle screw) and give it a good clean out as well. 
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Joined: Jun 2007
Posts: 46
Novice
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Hi guys, Just noticed your posts after being away for a while. The last time I played with the thing I could get it to start first time every time by closing the choke leaver (the grey leaver that is operated by the vacuume type solenoid),it is not a solid thing,meaning it has some slack in it,and if I twist it towards the closed direction it would start. So then i thought it was just a matter of adjusting the choke angle by sliding the wire through to the right point.Unfortunately I can't seem to find the happy medium,if I let it close too much the thing "hunts" where there is not enough speed to operate the solenoid.So I have attempted to adjust the idle speed (black phillips head screw) and the "jet" screw (brass)to to get a happy medium but so far havn't sucseeded.Really I don't have a clue as to how to set it up correctly. Any thoughts???
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Joined: Jun 2007
Posts: 46
Novice
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Played with the thing again last weekend and the problem is definately to do with the choke. Had it firing up all day but once it gets a bit cold it will not start unless I force the choke closed more. As i said previous adjusting it closed more only leaves it running too roughly to get the vacuume to work and it just hunts along. Bruce i did remove the main jet completely to look for an 'O' ring but it doesn't seem to have one. Also as fast grass has suggested ,once I thought I had it running sweet I covered the thing in nail polish wich hopefully sealed it as well. Does anyone have any ideas with the vacuume thing,a sring maybee??Cheers Greg
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Joined: Oct 2010
Posts: 1,819 Likes: 6
Junior Technician
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I would suggest that you ignore the choke issue and get it running warmed up and run it hard under load for a few mins and then kill it. Pull the plug and check it for colour. (called a plug chop)
If its a nice colour (white is lean, black is rich, aim for a grey-brown) you have the jetting right.
Get your tools out, remove that choke pot etc and throw it in the bin. Block up the vacuum line prefferably at the source. Then using some smarts, which after reading this thread, im sure youve got, fasion yourself up a bit of a ye olde style choke lever. Take care and think idiot when you make up whatever, that lever on the carb looks like its fantastic plastic, last thing you want is to do a fantastic job and have it work well for 10 years then have a gung ho mate get all heavy handed and break the thing.
Not sure how it all fits under the cover. But im sure with a rod, some extra straightened out wire the same guage, you could make something up, run it through some bits of tin plate with holes in it as a guide. With a spring you could have it work opposite, it sits off, and you hold your finger on it to close the choke, motor starts then you let the choke off. Have it in a spot where its not proud of the outer housing. Not sure it you could get it anywhere near the control pannel. Im assuming it gets itself up and revving Ok and only needs the choke for the initial start.
Interesting reading about the problems. I have a chinese generator here but its a bigger one with a gravity fed tank. Missing the remote. Was missing the key too but i made one. Im wondering if i should get a remote, not so sure it would have much benifit.
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Joined: Jul 2005
Posts: 6,362 Likes: 11
Administrator - Master Technician
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Hi Bob, the thread you replied to is over 12 months old mate, I will close the topic. 
Please do not PM me asking for support. Please post your questions in the appropriate forums, as the replies it may receive may help all members, not just the individual member. Kindest Regards, Darryl
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