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December 14, 2018, 12:32:21 PM
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  Elan 250 carb issue
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   Author  Topic: Elan 250 carb issue  (Read 192 times)
Elan Dude
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Elan 250 carb issue
« on: January 11, 2018, 11:22:51 AM »
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Need help from the carb gurus.

74 Elan 250 sled wouldn't start at the beginning of season. Check the usually problem sources. Electrical, gas line and came down to carb issue. Removed the carb, clean thoroughly. Remove control lever, clean inlet needle. Removed/cleaned the adjustment screw and set back 1 turn. reassembled the whole carb and reinstalled on the sled. Squirt of gas in the carb and started on first pull with full choke. Let it run for few second and open up the choke when warmer. I could rev the engine at 1/2 throttle but if I let go the throttle, it will not idle and eventually die. Could start with choke 1/2 open go trough the same sequence and would die at idle again and again. Adjusting the Idle speed screw doesn't do anything. Any insights? Thanks for your help. 
« Last Edit: January 11, 2018, 11:26:58 AM by Elan Dude » Report to moderator Logged

71 Oly 335E
74 Elan 250
77 Everest 340
79 Blizzard 5500
71 SkiBoose MK I
Longnecker
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Re:Elan 250 carb issue
« Reply #1 on: January 15, 2018, 03:40:42 PM »
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Might be a weak pulse going into carb not allowing it to pump.

Check the gaskets between jug and carb, especially around the small pulse hole.

Make sure the plastic isolator flange is flat on both sides. Sand smooth on a flat surface.

Make sure the plastic flange is not cracked around the pulse hole.

Hopefully the crank seals are in good condition so a pulse is achievable.
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Elan Dude
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Re:Elan 250 carb issue
« Reply #2 on: January 17, 2018, 03:39:16 AM »
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Thanks Longnecker for your suggestions.

I will give it a try.
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71 Oly 335E
74 Elan 250
77 Everest 340
79 Blizzard 5500
71 SkiBoose MK I
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