RE: Problem problem problem - 10/31/2009 2:28 AM
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still4given
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From: Victorville, CA, USA
Status: offline The needle valve location is not going to matter. All it is is a valve. The relation of the spray bar in the carb and the center-line of the tank is what is important. Almost every person here has suggested that you switch to a smaller prop, yet if haven't seen in any of your posts that you have. This may be the single most important thing and easiest to try, Have you done it yet?
You said the engine is used. It may just not have enough compression to create good enough fuel draw to pull the fuel straight up. Especially if you tank is not right behind the engine. Did you check to see if the clunk line has come undone inside the tank? Very common.
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RE: Problem problem problem - 10/31/2009 5:12 AM
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Vacaman
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From: Santiago, CHILE
Status: offline You may have a loop on the clunk line, inside the tank, and its against the front side.
Also, some time ago a friend of mine had the same problem on a engine that he bought used. The engine had a screw inside the muffler, after the baffle. When the engine pointed up, the screw jump to the exit hole and shut the engine off.
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RE: Problem problem problem - 10/31/2009 5:15 AM
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grinder-RCU
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From: London, ON, CANADA
Status: offline Check fuel line inside tank for cracks. Fuel line coud be cut inside the tank where it comes off the brass tube. Also clunk could be stuck forward in the tank resulting in a fuel draw loss when held verticle.
Grinder.
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Guys,
the pick up fuel line inside the fuel tank is too "stiff",strong ,i don't know how to express my self better,
so as to make a loop.
Also,
the clunk,
i checked double it's location inside the tank,i mean it's length,
and it's not come in contact with the fuel tank vertical side.
As for the compression.
I think it's good.
But even if it isn't how should i resolve this?
I must go to my LHS and buy a 10x6 prop.
Until then,
i have thought that maybe a better glow plug will help.
On the test run,
i have used an OS A5,
now i switched to a hotter A3.
Will see.
I was also advised,
prior to take off the fuel tank and check it ,
to install temporarily on the side of the fuse a similar fuel tank and run the same test.
If engine behaves the same,
then the problem is in the fuel tank.
