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  '73 Elite carb
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   Author  Topic: '73 Elite carb  (Read 605 times)
hotdoo
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'73 Elite carb
« on: April 15, 2017, 06:44:19 PM »
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Worked this week on getting '73 Elite up north running,after finding the pickup tube floating,pulse line not hooked up, I got it running,but it has a consant dribble of gas running out of throat of carb and it won't idle down enough to safely change gears. This Tilly has a set low speed jet,so there is no adjustment,it runs at medium and high speed but still dribble gas the whole time. Any thought are welcome.hotdoo
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GaWajn
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Re:'73 Elite carb
« Reply #1 on: April 16, 2017, 03:07:24 AM »
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To my knowledge ... only three possibilities for dribbling gas out the carb throat. Leaking welch plug (unlikely), a faulty nozzle check valve or the needle and seat are not sealing correctly.

I would start with the needle and seat which is the most common cause for this problem. Putting in a fresh gasket and diaphragms kit would probably help also if it has been sitting a while. Good luck.
« Last Edit: April 16, 2017, 03:08:41 AM by GaWajn » Report to moderator Logged

1970 Ski Doo TNT 292 Bogie (Restored)
1974 Ski Doo Elan (Habs - custom)
hotdoo
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Re:'73 Elite carb
« Reply #2 on: April 16, 2017, 10:17:58 AM »
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Thanks I think I'll get a needle and seat first.
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hotdoo
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Re:'73 Elite carb
« Reply #3 on: February 8, 2018, 04:16:06 PM »
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Strike two, took the darn thing apart,welch plugs included,put in ultrasonic tank and cooked the goofy thing. Put it all back together and same results. Few years ago this back-fired through the carb at a show(quit running),it actually blew the diagram material apart,it hasn't run right since. It's not the seals those were replaced a year ago when I pulled motor to fix starter. Bafffled by it all. Another question,anyone know anywhere that makes a long azz throttle cable for one of these,my cable is almost shot! thanks hotdoo
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Longnecker
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Re:'73 Elite carb
« Reply #4 on: February 8, 2018, 06:57:42 PM »
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if it pumps gas up the fuel line and into the carb but goes back down the line when you stop or it sit for an hour then the needle may not be seating causing it to dribble.

Try cleaning the seat with a round tooth pic or pointed wooden dowel and the rubber tip of the needle with a strong solvent like acetone/finger nail polish remover. The solvent will clean and soften the rubber making it seal a bit easier. If the rubber is in the seat and the needle tip is metallic, change the set out to a rubber tipped needle and metallic seat.

If it holds gas in the line and carb, then it might be the check valve. punch it out, hit it with carb cleaner and compressed air.

If the carb has a brass fuel filter screen in it you might try an additional in-line fuel filter as the brass one is a little course. They make a stainless one that is a finer mesh. it only takes the slightest contamination to cause the needle or seat to leak.

Good Luck !
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hotdoo
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Re:'73 Elite carb
« Reply #5 on: March 8, 2018, 11:49:29 AM »
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Took apart carb again! Looking at different needle and seat, found I had a new old stock gas ball one,put that in, and put allnew gaskets in it too. Also found another H-D carb which had same inlet's and outlets and rebuilt that too. Next time up,this weekend I'll try it again. hotdoo 
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hotdoo
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Re:'73 Elite carb
« Reply #6 on: March 27, 2018, 04:44:48 PM »
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All that work and I got nothing,I did finally it outside barn,it didn't sound too bad then all of a sudden I could hear it loading up so I backed back into barn where it stalled haven't been able to get it to stay running since!!! Going to try to find another carb with pulse line and return on  it,if that doesn't work ,motor is coming back out! hotdoo
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hotdoo
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Re:'73 Elite carb
« Reply #7 on: December 2, 2018, 06:58:36 PM »
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Ok, I got it set up with a HRM Tilly carb,but I'm still working out the bugs! Worked on it this weekend and found it wouldn't suck gas,pulled the lines out of tank to find pickup had fallen off! Fixed that but I have to do something with pulse line, it's kinks to easy. hotdoo
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