M-25XPB Kb cousin engine . interesting

[KWKloeber]

XPB owners, here's what your engine looks like (basically) not including the added marineized parts (and deducting the non-marine ones, like the mechanical fuel pump.) 

Note the different valve cover.  Your intake manifold has a knockout plug to accept a Kb part (hose stub-out, shown) to which you can attach your crankcase breather hose rather than dangling it next to the air breather (as Wb did.)

[Ron Hill]

Ken : FYI, my XPB already had the crank vented into the intake manifold.

A thought

[KWKloeber]

Ken : FYI, my XPB already had the crank vented into the intake manifold.

A thought

Ron, VERY interesting, I haven't seen any like that (except one that I ordered the Kb stub-out for an owner) -- only seen the ones with the 45-degree cut off hose zip-tied in place.  Ugggggh!

Was yours in that round knockout or attached in a different way (threaded hose barb, etc. ?)

-k