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Old 10-23-2019, 06:11 PM
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What size fuel line do I use?

I got a used plane. I need to replace the fuel line but Im not sure what size i need. 1/8 or 3/32. For a gas engine. I was thinking flow master 1/8 but i dont know the difference. I have a GP 123
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Old 10-23-2019, 07:29 PM
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I use 1/8 inside diameter fuel line on everything
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Old 10-24-2019, 07:54 AM
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https://www.mcmaster.com/5119k41
Use this and you are done forever.
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Old 10-24-2019, 08:45 AM
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I would use 1/8" for 50cc and above.
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Old 10-24-2019, 11:57 AM
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The I.D. of the carburetor fuel inlet is the size you need.
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Old 10-24-2019, 12:23 PM
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Quote:
Originally Posted by ERICKUO View Post
The I.D. of the carburetor fuel inlet is the size you need.
And every newer Walbro carb uses the same inlet fitting size regardless of carb size. 1/8" ID line seems best. 3/32" is preferred by some but it can be very difficult to get on fittings. Some chainsaws and lawn equipment use a Viton line size just a tiny bit smaller than 1/8" that seems to work well.
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Old 10-25-2019, 06:17 PM
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I use 3/32 for under 50cc Normally, the Small Diameter helps with fuel draw a little bit also fits the smaler fittings better.

1/8 for 50cc and upto 200cc+

But Really 1/8 can be used for all. As Trucker said the newer carbs all seasm to be 1/8 as are most new gas fuel tanks regardless of size.
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