Is A2 fuel return line necessary?

1959 - 1978, M151, M151A1, M151A2, Technical questions and discussions, regarding anything related to the M151.
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mytmight
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Is A2 fuel return line necessary?

Post by mytmight » Mon Jun 20, 2022 8:16 pm

Hello again. I have installed a 1972 M151A2 motor in my Mighty Mite.
Is a fuel tank return line required with the stock mechanical fuel pump?
TIA, Ronny.


hambone
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Re: Is A2 fuel return line necessary?

Post by hambone » Tue Jun 21, 2022 6:31 am

You should be fine without it.

Rickf
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Re: Is A2 fuel return line necessary?

Post by Rickf » Tue Jun 21, 2022 2:45 pm

No, That is not a fuel return line anyway. It is a vapor return line to supposedly help relieve vapor lock. You can block it off with no dire consequences.
1964 M151A1
1984 M1008
1967 M416
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acudanut
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Re: Is A2 fuel return line necessary?

Post by acudanut » Thu Aug 11, 2022 9:24 am

Hello again. I have installed a 1972 M151A2 motor in my Mighty Mite.
Is a fuel tank return line required with the stock mechanical fuel pump?
TIA, Ronny.

Pictures please. I have never seen a might mite with a M151 powerpack. Did it fit well ? What mods were done ?

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acudanut
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Re: Is A2 fuel return line necessary?

Post by acudanut » Sat Aug 13, 2022 7:11 am

"
acudanut wrote:
Thu Aug 11, 2022 9:24 am
Hello again. I have installed a 1972 M151A2 motor in my Mighty Mite.
Is a fuel tank return line required with the stock mechanical fuel pump?
TIA, Ronny."

Pictures please. I have never seen a might mite with a M151 powerpack. Did it fit well ? What mods were done ?


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