Author Topic: 78 intruder wont stay running  (Read 5785 times)

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heiner921

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78 intruder wont stay running
« on: October 15, 2014, 09:33:55 PM »
So I had my 78 intruder 440 running and riding 2 years ago.. been sitting for 2 years... got it back out fir this coming winter.. I cleaned the carbs and cleaned out the fuel tank. changed fuel lines and added new gas... It will start if I hold throttle wide open... let off the throttle to let sled idle and it will die... any thought will be appreciated.

Lloyd (ljm)

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Re: 78 intruder wont stay running
« Reply #1 on: October 16, 2014, 05:43:47 AM »


 There will be some plugged passages in the carbs. At the least the pilot system.

 The best way to clean them is with an ultra sonic cleaner. I have also had good results soaking them in Pin-Sol
77 SST
78 Intruder
79 340 Invader
80 440 Invader
80 Drifter (bought new)
80 LTD 4/6    X2

Several Deeres

heiner921

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Re: 78 intruder wont stay running
« Reply #2 on: October 16, 2014, 12:18:56 PM »
Will the sonic cleaner or the pin - sol wreck any of the rubber

Dandb7

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Re: 78 intruder wont stay running
« Reply #3 on: October 16, 2014, 02:13:30 PM »
I wouldn't use 100% Pine-Sol on rubber......if it's well diluted you shouldn't have any issues...

100% Pine-Sol works really well on aluminum casings......just fully cover the part , let it sit for 1 day and brush off the dirt..
1982 Kawasaki Interceptor 550 #558
1979 Kawasaki Drifter 440
1989 Arctic Cat Pantera 440
2012 Arctic Cat F1100 Turbo 50th Anniversary 2015 Arctic Cat Lynx 2000

Lloyd (ljm)

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Re: 78 intruder wont stay running
« Reply #4 on: October 16, 2014, 04:30:27 PM »


 ultra sonic cleaning won't hurt the rubber.

 I usually completely disassemble the carbs prior to cleaning
77 SST
78 Intruder
79 340 Invader
80 440 Invader
80 Drifter (bought new)
80 LTD 4/6    X2

Several Deeres

heiner921

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Re: 78 intruder wont stay running
« Reply #5 on: October 18, 2014, 08:06:43 PM »
got it running...pilot jet was plugged solid!

Lloyd (ljm)

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Re: 78 intruder wont stay running
« Reply #6 on: October 19, 2014, 07:22:44 AM »


Those pesky plugged pilot jets do keep them from idling :)

 Glad you got it running!
77 SST
78 Intruder
79 340 Invader
80 440 Invader
80 Drifter (bought new)
80 LTD 4/6    X2

Several Deeres