Proven to be a trouble-free mechanical pressure pump. Original equipment on numerous airframe installations and adaptable to most applications with one of three dual diaphragm types. Overboard vent of this design provides operating assurance throughout all flights.
Takes gasket 60096 which is not included. (See Accessories)
This pump is listed as a drop in replacement for the 25-30 psi LW-15473 pump. This is supported by Lycoming SL L255A. However, the 62B26931 pump is a higher pressure pump 30-35 psi. Operationally OK by Lycoming but triggers a high pressure alert on my fuel pressure system requiring either a new 15473 pump tr a trip to the factory for my electronic indicating system.
An actual 40295 pump is required for O-360 with side draft HA6 carburetor. LW-15472 does not fit.
Per the manufacturer: No, it is not recommended.
Standard Lycoming warranty is 1 year.