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Old 01 January 2019, 04:17   #1
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Primer bulb

Do l need to have a primer bulb in my fuel line?. I have now replaced 2 in 18 months at @£35 each.

The engine is a Suzuki 175 with fuel injection and started & ran fine without priming after replacing the bulb. I know there is a one-way valve in the bulb.
I can see the point of one if the engine has carbs or has a removable fuel tank.

Thanks
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Old 01 January 2019, 05:31   #2
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my mercury 100 doesn't have one and always starts
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Old 01 January 2019, 06:25   #3
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also the ETEC G2 has no primer bulb anymore
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Old 01 January 2019, 07:18   #4
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Iíd keep one in line just incase , Running a fuel pump dry on the newer engines is a major No No!
Couple of primes and youíve peace of mind thereís fuel in the system before you turn the key.
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Old 01 January 2019, 09:29   #5
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Originally Posted by Waterman View Post
Iíd keep one in line just incase , Running a fuel pump dry on the newer engines is a major No No!
Couple of primes and youíve peace of mind thereís fuel in the system before you turn the key.
I know some big engines don't have a priming bulb and rely on the low pressure pump to create the vaccume to pull fuel through don't know why running a diaphram pump dry would harm it it's only a only a mechanically pushed membrane off the cam shaft.
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Old 01 January 2019, 09:58   #6
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Primer bulb

Personally I have one fitted just after my Racor Fuel filter/water separator. Itís useful for repriming the system after emptying/changing filters. Fuel from the Forward fuel tank has a bit to travel, low pressure pump probably would pull it through eventually but still wouldnít like running the pump dry.
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Old 02 January 2019, 04:34   #7
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Quote:
Originally Posted by Paul Cannell View Post
Do l need to have a primer bulb in my fuel line?. I have now replaced 2 in 18 months at @£35 each.

The engine is a Suzuki 175 with fuel injection and started & ran fine without priming after replacing the bulb. I know there is a one-way valve in the bulb.
I can see the point of one if the engine has carbs or has a removable fuel tank.

Thanks
Racor do a filter/separator with a built in primer which I installed 2 years ago, far more reliable and a much neater solution.

Andy
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