OK, not as versed on these 40hps as Frank…But, I know that the pump changed a bit in the late 60s. The 378348 housing is listed for the 1960 40hp and doesn’t supercede, according to Marineengine.com The 1969 40hp uses the 381576 housing, which has the extra water tube that attaches to the end cap where the other two water tubes connect…
Now it is certainly possible that these two part numbers are for the same housing, perhaps one is a “kit” or something like that. The original cap gasket from the 1960 model supercedes to the gasket used in 1969. What do you think Frank?
In any event, I did see a few reasonably priced 378348 caps on ebay also…
