Airsep check valves

[steve c]

How many Airsep check valves should I look for on a 1987 Covington 671 tib engine. I only seem to be able to find 1 on the inboard side of the motor.

 

[osprey]

One check valve for every Airsep, positioned vertically.

P

 

[doc g]

the drain lines could be plumbed together and then drained thru one check valve, who knows you need to trace out the drain hoses. I re plumbed mine and used only one check valve and rerouted the it to drain in a gallon milk jug instead of back in the crankcase, trace out the drain lines......Pat