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Accelerator Pump Problems

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RedandWhite73 View Drop Down
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    Posted: August-12-2013 at 6:17pm
I have a question about the accelerator pump issue I'm currently dealing with. I tested to see if the linkage was adjusted properly and the pump was actually squirting fuel when the plunger is depressed. The linkage looks to be perfectly adjusted. The pump also sprays fuel when depressed. I took off the linkage and manipulated the plunger by hand to see if I could get it to operate without accelerating. When I depress the plunger the engine almost immediately kills. Could this be a jet size issue? The pump also sprays in a cylindrical pattern, not a mist. Not sure if that is an issue. Any ideas?

Thanks,
Dan
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Bri892001 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Bri892001 Quote  Post ReplyReply Direct Link To This Post Posted: August-12-2013 at 6:27pm
Originally posted by RedandWhite73 RedandWhite73 wrote:

...I took off the linkage and manipulated the plunger by hand to see if I could get it to operate without accelerating. When I depress the plunger the engine almost immediately kills. Could this be a jet size issue?...


Just a guess, but if you're working the accelerator pump this way (linkage disconnected), the motor would be getting a bunch of fuel from the accelerator pump shot, without getting air because the throttles would be closed. So, this could be the problem.


Originally posted by RedandWhite73 RedandWhite73 wrote:

The pump also sprays in a cylindrical pattern, not a mist. Not sure if that is an issue. Any ideas?


That should be normal. It's a stream, and it's aimed to "break" against... I forget, but another part of the throttles...

Is there a problem you're trying to work through?
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RedandWhite73 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote RedandWhite73 Quote  Post ReplyReply Direct Link To This Post Posted: August-12-2013 at 6:38pm
When I have the linkage installed and open the throttle, the fuel squirts out in the same manner, the throttle blades open, and the engine dies almost immediately.
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81nautique View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 81nautique Quote  Post ReplyReply Direct Link To This Post Posted: August-12-2013 at 7:01pm
If you're getting a good squirt instantly when giving it throttle I would check the timing. What engine is in the boat?
You can’t change the wind but you can adjust your sails
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RedandWhite73 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote RedandWhite73 Quote  Post ReplyReply Direct Link To This Post Posted: August-12-2013 at 7:07pm
The boat has a 340. Sounds good, I'll check the timing and report back my findings.
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