drifter001 Posted July 14, 2022 Report Posted July 14, 2022 29 minutes ago, Fly Boomer said: You need to figure out what's wrong with your battery or charging system or wiring before you go further with the pump. "Starts the engine" does not mean the battery is okay. im on a 12v system though so wouldnt that be charged. after running the engine for a bit today before scrubbing the flight, battery read about 12.4 and was reading that when i left the hanger Quote
Fly Boomer Posted July 14, 2022 Report Posted July 14, 2022 27 minutes ago, drifter001 said: after running the engine for a bit today before scrubbing the flight, battery read about 12.4 and was reading that when i left the hanger If you are seeing 12.4 OCV (open-circuit voltage) with battery unhooked, that is good. Not a substitute for a capacity check, but good enough to run that pump. Have you checked voltage at the pump? Quote
drifter001 Posted July 14, 2022 Report Posted July 14, 2022 33 minutes ago, Fly Boomer said: If you are seeing 12.4 OCV (open-circuit voltage) with battery unhooked, that is good. Not a substitute for a capacity check, but good enough to run that pump. Have you checked voltage at the pump? I couldn’t find where the pump terminals were (wires seemed hardwired) but when I tapped the pump with a mallet and the switch in the on position, the pump started working Quote
Shadrach Posted July 14, 2022 Report Posted July 14, 2022 4 hours ago, drifter001 said: im on a 12v system though so wouldnt that be charged. after running the engine for a bit today before scrubbing the flight, battery read about 12.4 and was reading that when i left the hanger What kind of battery do you have? A 12V lead acid battery is 100% charged at 12.6V. A 12V AGM battery is 100% charged at 13V. A good Skytec starter will turn the engine at low voltage levels. I don’t know how sensitive your fuel pump is to voltage, but your first step is to make sure the battery and charging system are in order. How did the pump respond while the engine was running? My fuel pressure increases by several psi when I turn my boost pump on with the engine running. Quote
drifter001 Posted July 15, 2022 Report Posted July 15, 2022 1 hour ago, Shadrach said: What kind of battery do you have? A 12V lead acid battery is 100% charged at 12.6V. A 12V AGM battery is 100% charged at 13V. A good Skytec starter will turn the engine at low voltage levels. I don’t know how sensitive your fuel pump is to voltage, but your first step is to make sure the battery and charging system are in order. How did the pump respond while the engine was running? My fuel pressure increases by several psi when I turn my boost pump on with the engine running. Pump didn’t even run with engine running. Once back in the hanger I turned master on and pump on (pump didn’t work), left the switch on and tapped the pump a few times with a rubber mallet and viola, it worked Quote
Shadrach Posted July 15, 2022 Report Posted July 15, 2022 1 hour ago, drifter001 said: Pump didn’t even run with engine running. Once back in the hanger I turned master on and pump on (pump didn’t work), left the switch on and tapped the pump a few times with a rubber mallet and viola, it worked The brushes are warn and not contacting the commutator. Send it to Aeromotors for OH. Quote
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