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StevL · 11-24-2008, 05:39 PM

Yesterday I was flying my 50cc yak and everything seemed fine. We did a little hovering, rolling circles, harrier, pattern stuff and just punching holes in the sky. Suddenly without notice I was doing a very low inverted pass and started to pull a up line (near straight up). Suddenly the engine started coughing and almost shut down.

After landing, check the fuel, it was fine and still a half tank. Put about a 1/8 turn richer on the carb, both high and low thinking this is the coolest weather I've flown in since last year (high 55).

Another flight doing some hole punching (at about 4 minutes into the flight) it coughs and dead sticks.

I checked the clunk line and it is very stiff. It will not fall 1/4 the way to the bottom (top) of the tank when turned inverted. I'm using Tygon fuel line and it is only about 3 months old.

What do you guys use for the clunk line? Anything that stays more flexible?

11-24-2008, 05:39 PM	#1 (permalink)
StevL Gettin' Lower! Join Date: Apr 2006 Location: South Carolina Posts: 56	Clunk Line Yesterday I was flying my 50cc yak and everything seemed fine. We did a little hovering, rolling circles, harrier, pattern stuff and just punching holes in the sky. Suddenly without notice I was doing a very low inverted pass and started to pull a up line (near straight up). Suddenly the engine started coughing and almost shut down. After landing, check the fuel, it was fine and still a half tank. Put about a 1/8 turn richer on the carb, both high and low thinking this is the coolest weather I've flown in since last year (high 55). Another flight doing some hole punching (at about 4 minutes into the flight) it coughs and dead sticks. I checked the clunk line and it is very stiff. It will not fall 1/4 the way to the bottom (top) of the tank when turned inverted. I'm using Tygon fuel line and it is only about 3 months old. What do you guys use for the clunk line? Anything that stays more flexible?