Very slow acceleration on a P120 SE - Page 2 - RCCanada - Canada Radio Controlled Hobby Forum
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Old 09-27-2010, 11:59 PM   #11
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I am: Dean Wichmann
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Re: Very slow acceleration on a P120 SE

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Hi Allan

I talked with Bob today and a pump voltage of 3.55 for the P120 is high. Generally, you should be looking at around 3 volts or less. My Titan as an example runs at 3.5 volts. However, this could be as a result of a restriction or fuel stick issues / ecu programming. Its really hard to say. Most pumps manifest problems on start up with the kerostart. Some pumps can be initially sticky and need a run in period of say 30 minutes at 5 volts. However, your pump has seen 7 hours which means it should be well seated by now. The Hausel pump is not user serviceable.

Before sending the pump back call Bob at JetCat and let him know what has happened. Try the new pump for at least 3 flights. Watch the temperatures and pump voltages carefully to eliminate any other faults. If needed then send the pump back to JetCat - it will be repaired if required. DO NOT TAKE THE PUMP APART OR TAMPER WITH THE RED COLORED BOLT HEADS. The seating of seals is a very delicate operation and will void any chance of getting the repair done.

Its no longer a hobby after 40 years....gulp!
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