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Old 09 May 2015, 10:36   #1
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Yam 30 Fuel Problems

I bought a new fuel line for my Yamaha 30 as the old one was perished and we had some problems when we went out for the first time. I fitted it on Tuesday and it primed well and the bulb went solid, however I've just tried to run the engine but it was stubborn to start (which is unusual as this engine usually starts on the 1st or 2nd pull) and it would die after 10 or so seconds. One thing I noticed is also the fuel bulb went completely flat when I primed it. It would also seem to suck the fuel out of the filter when priming.

I took the connector off and put both ends into the fuel tank, pumped fuel fine!

Not sure what is wrong, and couldn't even get the fuel filter out as it wouldn't unscrew.. any ideas?
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Old 09 May 2015, 12:09   #2
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Check the fuel connection on the engine. The male connector can cause issues. Check the ball-bearing isn't seized. Also check the fuel filter on the engine. Should be straight forward to unscrew. Finally, the primer bulb (if not new) is worth replacing. Just like the fuel hose they deteriorate with age. Quicksilver ones are the best.
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Old 09 May 2015, 12:35   #3
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Was tank vent fully open? Only asking as I had similar problem with. 55 hp.
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Old 09 May 2015, 14:59   #4
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I've had the inner liner on cheap fuel line completely separate and collapse on me.
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Old 09 May 2015, 15:05   #5
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Quote:
Originally Posted by spartacus View Post
Check the fuel connection on the engine. The male connector can cause issues. Check the ball-bearing isn't seized. Also check the fuel filter on the engine. Should be straight forward to unscrew. Finally, the primer bulb (if not new) is worth replacing. Just like the fuel hose they deteriorate with age. Quicksilver ones are the best.
The entire fuel line is brand new, and I tried to unscrew it but it wouldn't budge :/

The tent vent was fully open and I even took the filler cap off as well but it made no difference, could it be a faulty fuel bulb? I'm fairly sure that it is not a problem with the engine side of things however I will still look at the fuel filter and replace if I can't unscrew it.
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Old 09 May 2015, 15:11   #6
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Are the lines directional.
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Old 09 May 2015, 15:15   #7
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Are the lines directional.
The fuel line to the engine is and is the correct way round, arrow on the bulb going to the engine
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Old 09 May 2015, 15:42   #8
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Is it possible to bypass the filter to eliminate it from the problem?
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Old 09 May 2015, 16:29   #9
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Is it possible to bypass the filter to eliminate it from the problem?
May be able to, I will give it a go and see what happens
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Old 10 May 2015, 02:14   #10
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Personally I would bin the tank and the fuel line. Those cheap Italian tanks are pretty useless, the fuel pickup pipes alway end up unscrewing or leaking. Cheap primer bulbs can have faulty valves.

Sceptre Canada make the best tanks, they produce them for Yamaha, quicksilver and Suzuki as OEM. They are more than double the price of a cheap tank but well worth it. Yamaha complete fuel lines are good with the best connectors, stainless crimps etc but as said before the quicksilver primer bulb is very good too.
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