Each time I remove the cowling on my RV9A, I notice that the top diaphragm of the low pressure mechanical fuel pump has a bead of oil around it. Also, a few of the bolt heads on the bottom of the pump will have a drip of oil clinging to them. I always wipe the oil up with a paper towel but it reappears every time - even if it's just one flight around the local patch. Not sure how long this has been happening - I'd say at least a year.
The engine is an ECI Titan O-340 with about 300 hours, and it has a Tempest fuel pump. The amount of oil is not a concern, a few small drops at most. The pump continues to operate just fine. I tightened the bolts and screws on the fuel pump that I could reach just a bit to see if that would solve the issue, but no luck.
Should I look into replacing this pump, or leave well enough alone? If I replace it, should I go with another Tempest or the more expensive Lycoming pump?
The engine is an ECI Titan O-340 with about 300 hours, and it has a Tempest fuel pump. The amount of oil is not a concern, a few small drops at most. The pump continues to operate just fine. I tightened the bolts and screws on the fuel pump that I could reach just a bit to see if that would solve the issue, but no luck.
Should I look into replacing this pump, or leave well enough alone? If I replace it, should I go with another Tempest or the more expensive Lycoming pump?