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Old 08 July 2013, 06:15   #1
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Fuel Line

Looking for some advise!!

What is the correct size fuel line for a Tohatsu 50 HP outboard (2 Stroke)

I have a slight leak in the current line and looking to replace bulb and line.

Steve
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Old 08 July 2013, 09:57   #2
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That depends how far you open the throttle!

Joking aside, unless you have a particualrly long run between tank & engine 3/8" will do. I used to run a Suz 30 on a 1/2" bore / priomer etc. Swapped the connector form Suz to Yam & used it to feed a 55. Would run hapily up to about 4200 RPM then jsut die of fuel starvation.

Been running the Merc (60 HP) on 3/8 with no problems.
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Old 08 July 2013, 10:12   #3
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Just as a comparison, I'm pretty sure my F115 is on 3/8" as well.

jky
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Old 09 July 2013, 12:40   #4
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Thanks for the replies, however I have been on the Tohatsu web site today, and managed to find that the fuel line is stated as 8mm or 5/16th.

Regards

Steve
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Old 09 July 2013, 16:11   #5
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My merc 60 2 stroke uses 3/8 fuel line on main tank, but i also have a extra tank that is fitted with 8 mm both work ok although have not had boat on max revs for long on extra tank, but certainly seems no problem.
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Old 10 July 2013, 08:36   #6
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5/16 is halfway between too small & too big!


I would treat that as a minimum - 3/8 will not cause problems, and as I said if you have a long run it's not a bad idea to go up a size anyway to reduce flow friction.

If your chandler only stocks 3/8 or 10mm or whatever, don't worry about it. Just make sure your hose & barbs are in the same size series......
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