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7020 Fuel System
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CDN 400 View Drop Down
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Joined: 05 Apr 2014
Location: On. Canada
Points: 81 		Post Options Post Options   Thanks (0) Thanks(0)   Quote CDN 400 Quote  Post ReplyReply Direct Link To This Post Topic: 7020 Fuel System
    Posted: 28 Mar 2024 at 10:22am
Is there a check valve somewhere inline? This thing will fire about once then you have to crank and crank to get it lit. I removed the fuel after sitting and its half empty and the fuel line to the filter head from the tank was drained back to the level of fuel in the tank.
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tbran View Drop Down
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Joined: 14 Sep 2009
Location: Paris Tn
Points: 3298 		Post Options Post Options   Thanks (0) Thanks(0)   Quote tbran Quote  Post ReplyReply Direct Link To This Post Posted: 28 Mar 2024 at 10:36am
The hand pump serves as a check - it has two check valves in it - IF the rubbers in the plunger are loose and the inlet check valve has a piece of trash in it or doesn't seat - bingo.   To see - let it set - THEN pump it up before starting and then see if it cranks and dies.  Some 7020's had a low pressure electric pump installed...they have failed and also pump air in the system on occasion - 40 + years old...... anything can happen from hardened sleeves seals in the line nut to pin holes..

Edited by tbran - 28 Mar 2024 at 10:39am
When told "it's not the money,it's the principle", remember, it's always the money..
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CDN 400 View Drop Down
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Joined: 05 Apr 2014
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Points: 81 		Post Options Post Options   Thanks (0) Thanks(0)   Quote CDN 400 Quote  Post ReplyReply Direct Link To This Post Posted: 28 Mar 2024 at 11:09am
Thanks thats what I needed to know. I'll take it off and tear it apart and see what I find.
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