RD 17 Stalls

[slim60]

I installed the rebuilt carb today. Starts OK but stalls out after a minute. Checked for tank pressure and there is none. Hoses are clear. What should I look for next?

[fleetwin]

Well, I don’t know how much pressure will build up in a minute.

Will the engine keep running if you pump the primer button?

[david-bartlett]

Is this a known to be good tank? Did it hold pressure prior to this? Check valves can foul, gaskets go bad. After that, stuck leaf plate on the engine whre the pressure line comes off.

[frankr]

And, there is a pressure relieve valve in the tank. If you take the tank apart and do not get that valve back exactly where it was, it probably will leak.

[chris-p]

I have an inline gauge I use to first determine if the motor is pressurizing the tank or not. Without out the tool, I would recommend using that tank on another known motor if you have one? Or alternatively, try another tank on that motor?

If you then determine that the motor is fine, and the tank is at fault it will be time to take it apart and rebuild it.

A motor should totally pressurize the tank in a minute. After my tanks are rebuilt, they pressurize from the walk from the shed to the water, if its a hot sunny day anyways! That is when you will quickly determine if your o rings in your connector leak

[slim60]

The tank does not hold pressure so I’ll be needing new o-rings. Does anyone still sell the fixture for easy replacement of the o-rings? Thanks.

[al-lockhart]

Slim 60, how are you testing to see if the tank holds pressure? If you’re merely pumping the button all that does is pump fuel to the carb. The best way I have found to test pressure is to leave the tank indoors overnight then set it out in the sun for a couple of hours then loosen the cap. if you get a good pssssst it’s holding pressure

[slim60]

I tried another pressure tank that leaked fuel from the coupler when the button got firm. Motor stalled after a minute. Is there a way to check the crankcase air to the tank? The second tank is for my Fleetwin that ran last year. I’ll check both tanks with it tomorrow after I leave them in the sun for a while.

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