Fuel line size for TB

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erwin4734
Posts: 10
Joined: Sun Mar 27, 2011 10:38 pm

Fuel line size for TB

Post by erwin4734 » Thu Jan 21, 2016 12:03 am

Good morning,
What size fuel line would be best for 42mm TB setup on an 2165 type 4 (160hp)? I purchased 3/8 line, but looks mighty big compared to the OEM line. Planing on using the stock line as the return line. Any thoughts?
Thanks
http://www.jenvey.co.uk/images/stories/ ... tfp45i.jpg

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andy198712
Posts: 1601
Joined: Wed Apr 13, 2011 3:01 pm

Re: Fuel line size for TB

Post by andy198712 » Thu Jan 21, 2016 7:04 am

I've gone with 8mm kunfer line...

erwin4734
Posts: 10
Joined: Sun Mar 27, 2011 10:38 pm

Re: Fuel line size for TB

Post by erwin4734 » Thu Jan 21, 2016 9:31 am

Thanks, 3/8 equals about 9mm. I guess that's pretty close. Thanks again.

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Jadewombat
Posts: 1245
Joined: Sat Jun 22, 2002 2:01 am
Location: Houston, TX

Re: Fuel line size for TB

Post by Jadewombat » Wed Jan 27, 2016 6:47 pm

You can use the stock fuel line as a return line. It's been discussed here several times over the years. The smaller stock line may increase the annular velocity of the fuel returning the tank, but shouldn't create a restriction (pressure increase) on the return side if you mount the pressure regulator near the engine. It's up to you, but unless you're running some insane amount of fuel flow you can use the stock line as a return.

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