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Old 10 October 2013, 11:16   #1
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re-priming the fuel lines

I have a Yamaha 115 4 stroke that has just been serviced. they changed the external fuel filter on the water separator, however they did not fill it with fuel and re-prime it.

I turned the engine on hoping the fuel pump would pull ith through, but nothing. I filled the fuel filter, and pumped the bulb on the fuel lines but can hear air being pumped around. Do I simply have to keep pumping the buld until it comes through, or is there an easier way?

Cheers, Andy
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Old 10 October 2013, 11:25   #2
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I would disconnect the fuel line at the outboard and prime till you get fuel. If you're still having difficulties, back prime the primer bulb and try again. Still probs you've got an air leak or a blockage somewhere.
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Old 10 October 2013, 11:32   #3
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fuel

take it back to who serviced it
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Old 10 October 2013, 11:49   #4
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Remove the engine end of the fuel line. Stick a pin or nail in the engine fitting to keep it open. Pump the primer bulb until you get a consistent flow (pump into a container or if the hose reaches, back into the tank)

If that doesn't work, take it back to the servicing place to fix the air leak - which is most likely at the fuel filter gasket.
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Old 10 October 2013, 12:32   #5
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Quote:
Originally Posted by captnjack View Post
Remove the engine end of the fuel line. Stick a pin or nail in the engine fitting to keep it open. Pump the primer bulb until you get a consistent flow (pump into a container or if the hose reaches, back into the tank)

If that doesn't work, take it back to the servicing place to fix the air leak - which is most likely at the fuel filter gasket.
Yep!!
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Old 10 October 2013, 12:41   #6
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Unacceptable to have an engine serviced and for the firm to not re prime the fuel filter. An easy way is to just fill the new canister bowl assembly with fresh petrol prior to installation. Then run the engine and any air will easily be purged out.

I have always found Yellow Penguin in poole good for servicing.
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Old 10 October 2013, 12:48   #7
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Those bulbs are useless at pumping air. I had to totally re-build my forward tank (portables) arrangement becuase It took f-o-r-e-v-e-r to prime 4m of hose. I now move the primer bulb "jumper" to the front.

I guess the bulb is above the tank? I guess you could sook the engine end (take the connector off first!) until ou see / hear fuel in the filter & then the bulb should do what it's supposed to.

Although there is an argument for moving it to a lower down position so it "auto primes" .
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Old 10 October 2013, 14:08   #8
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I did this just last week filled the filter with the fuel that came out when I dismantled it,didn't quite have enough but with a bit of priming of the fuel bulb got the fuel through ran the engine for 10+ mins and all seems OK..
Just make sure the bulb is the right way up when you pump it.
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Old 10 October 2013, 16:44   #9
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Originally Posted by ring20johnson View Post
Unacceptable to have an engine serviced and for the firm to not re prime the fuel filter. An easy way is to just fill the new canister bowl assembly with fresh petrol prior to installation. Then run the engine and any air will easily be purged out.
Agreed but sometimes its not worth the fuel and the time to tow it back to the repair place.

Besides, doing it yourself you now know what needs to be done if you ever get a blob of water in the fuel filter. Sometimes you can dump out the water, reprime the lines and continue to limp home until the bowl fills up with water again.
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