I noticed the other day while cranking up the boat in the driveway that after handing the fuel line, I had black on my hands. Obviously the line is degrading and it is time for replacement. The current line is 1/4" but it is really tough getting it onto the fitting on the bulkhead coming from the fuel tank. I know if I go a size up in fuel line I have to replace the fitting at the motor but, does it matter if I go from 1/4" to 5/16 or 3/8? The motor is a Yamaha 70 TLRB.
Thanks
I cant see any problem, if it were a higher hp and you went down it would matter!
I agree with boatpoor because I have a 70 Yamaha and replaced the fuel line a few years back.I would suggest getting the best line money can buy.
I went through this a year or so ago. Ended up replacing all my fuel line with Trident A1-15 Marine Fuel Hose.
Had good reviews and Ethanol rated without being overly stiff.
https://www.defender.com/product.jsp?id=4010345
I’d also replace the bulb with an OEM Yamaha one. Nice to know it’s all taken care of before failure.
Trident is the stuff I’m looking at. Thanks all!
“Apathy is the Glove into Which Evil Slips It’s Hand”, but really, who cares?
Just know that some fuel line is rated for below deck others rated for above deck ( above deck should have a UV rating). To the best of my knowledge the hose ID should not matter if you move up in size but could be a problem if you move down in size due to a restriction in flow. I have 3/8 inch hose on my 30, 115 and on a 250 hp
without any problems. I also know that some of the ethanol rated hose utilizes a hose liner made of a material very similar to cellophane. I have had a problem when attaching fittings to this type of hose with the liner breaking free from the hose when sliding fittings on and actually causing a clog at the connection. Best bet would be to utilize a heat gun or blow dryer to warm the hose some before putting your fittings on.
going to a 5/16 fuel line is perfectly acceptable for that motor
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Thanks all, looking at Trident A1-15 or Shields A1-15 in 5/16.
“Apathy is the Glove into Which Evil Slips It’s Hand”, but really, who cares?