Re: Parts catalog for 1924 Model A,Johnson light twin 2hp.

[Anonymous]

The water pump parts that usually cause trouble are the check valves. There are two of them, and if they stick in the open position, water won’t flow up to the powerhead. Fortunately, they are easy to access, just unscrew the hex caps on the water pump. Keeping them free and loose is usually as easy as removing them, cleaning out the chambers with a soft nylon bristle or brass brush, making sure the seats are clean, then putting the check valves back in and replacing the caps.

email me at outboardguy44@gmail.com and I can help you out with a scan from one of my old factory booklets

By the way – if its a BNL, that makes it a long-shaft brass motor. The BN had brass lower unit, prop, and other castings on the exterior of the driveshaft tube. The "L" does indicate long shaft. I’ve seen lots of BN’s, but never a BNL. Have fun with it eh™

Best,
T2