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Old 05-03-2007, 09:32 PM
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Default Primer Ball ?

First the arrow should point to the motor right ? Next, when pumping the ball while it is facing down towards the hull it will not get hard, if you turn it up towards the sky it will get hard but when you let it go to lay in its regular position which is down towards the hull you can hear the fuel run trough the line and the ball gets soft? The boat has run fine . It is a new Yamaha F250 and I'm concerned. I dont want the fuel pump to go bad if there is no fuel being pumped to it. Any thoughts? Thanks !
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Old 05-03-2007, 09:41 PM
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Default Re: Primer Ball ?

Changing position on the bulb is screwing with the check valve in the ball. Reroute it so the the arrow points up. Shorten the hose or whatever it takes.
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Old 05-03-2007, 09:44 PM
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Default Re: Primer Ball ?

check for air leaks.
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Old 05-03-2007, 09:45 PM
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Default Re: Primer Ball ?

Do you mean switch the direction of the arrow or just bend the hose around so it remains up with the same arrow flow ?
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Old 05-03-2007, 11:32 PM
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Default Re: Primer Ball ?

Both the bulbs on my Yamahas were factory rigged to hang with the arrows pointing up. They're '03 and no issues at all.
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Old 05-03-2007, 11:48 PM
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Default Re: Primer Ball ?

idealy the bulb should be close to the motor and lay in the upward position, ALWAYS use a factory bulb on V6 motors, recommended on V4s, walmart and others is ok for smaller motors.
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Old 05-04-2007, 06:57 AM
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Default Re: Primer Ball ?

The arrows MUST point towards the motor no matter where the primer balls are located. If they do not hold pressure, they are bad
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Old 05-04-2007, 07:48 AM
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Default RE: Primer Ball ?

Quote:
2870bw - 5/3/2007 9:32 PM

First the arrow should point to the motor right ? Next, when pumping the ball while it is facing down towards the hull it will not get hard, if you turn it up towards the sky it will get hard but when you let it go to lay in its regular position which is down towards the hull you can hear the fuel run trough the line and the ball gets soft? The boat has run fine . It is a new Yamaha F250 and I'm concerned. I dont want the fuel pump to go bad if there is no fuel being pumped to it. Any thoughts? Thanks !
Yes, the arrow points towards the engine. When the bulb gets hard it indicates that the fuel system is pressurized. With carburetors, this means the fuel bowls are full and the needle valves have closed off. As fuel burns off the pressure drops. This is normal operation as long as the bulb doesn't collapse. If there was no fuel getting to the fuel pump the engine would quit. I hope this helps.
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Old 05-04-2007, 12:07 PM
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Default Re: Primer Ball ?

Quote:
Mac25 - 5/3/2007 11:48 PM

idealy the bulb should be close to the motor and lay in the upward position, ALWAYS use a factory bulb on V6 motors, recommended on V4s, walmart and others is ok for smaller motors.
Why does the bulb need to be close to the motor?
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Old 05-08-2007, 12:12 AM
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Default Re: Primer Ball ?

Quote:
jethro1 - 5/4/2007 12:07 PM

Quote:
Mac25 - 5/3/2007 11:48 PM

idealy the bulb should be close to the motor and lay in the upward position, ALWAYS use a factory bulb on V6 motors, recommended on V4s, walmart and others is ok for smaller motors.
Why does the bulb need to be close to the motor?
No
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Old 05-08-2007, 12:41 AM
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Default RE: Primer Ball ?

Quote:
2870bw - 5/3/2007 9:32 PM

First the arrow should point to the motor right ? Next, when pumping the ball while it is facing down towards the hull it will not get hard, if you turn it up towards the sky it will get hard but when you let it go to lay in its regular position which is down towards the hull you can hear the fuel run trough the line and the ball gets soft? The boat has run fine . It is a new Yamaha F250 and I'm concerned. I dont want the fuel pump to go bad if there is no fuel being pumped to it. Any thoughts? Thanks !
When you prime the fuel system the arrow should point upwards; this makes the check valve to work. Pump it until it gets hard (and give her a couple more squeezes after that) to assure your VST is full and start the engine.
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Old 05-08-2007, 01:11 AM
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Default Re: Primer Ball ?

Can you tell me what is the difference between a factory bulb and a walmart bulb? As long as its the same size and flow, what on earth would how much I pay for a replacement have anything to do with it?
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Old 05-08-2007, 07:42 AM
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Default Re: Primer Ball ?

Tempo brand bulbs have been known to induce problems.

Your replacing the bulb due to a problem. So you replace it with a new Tempo thinking the problem will be fixed.

It's new right? It must be good? WRONG! "Just cause it's new, doesn't mean it's worth a damn!"

Only use a OEM bulb for any replacement and you eliminate a lot of this type of problem.

Quote:
Do you mean switch the direction of the arrow or just bend the hose around so it remains up with the same arrow flow ?
No just mount it in a Vertical angle. Or when you pump it, turn the bulb to a vertical angle.
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Old 05-08-2007, 09:02 AM
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Default RE: Primer Ball ?

Here is a good article regarding primer balls.

http://continuouswave.com/whaler/reference/primer.html
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Old 05-08-2007, 09:25 AM
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Default RE: Primer Ball ?

BW23,

That is a great article. Clear reasoning for buying factory approved bulbs. A friend of mine just turned me on to that website also. A lot of very good info. Thanks.

Joe
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Old 05-08-2007, 09:27 AM
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Default Re: Primer Ball ?

Quote:
Mud Runner - 5/3/2007 11:32 PM

Both the bulbs on my Yamahas were factory rigged to hang with the arrows pointing up. They're '03 and no issues at all.
Same here Carlos.
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Old 05-08-2007, 12:18 PM
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Default Re: Primer Ball ?

wow thanks for the info on oem balls....never had any idea....
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