Well the water spraying out of every motor is not true. Some 70's Johnson's and Evinrude's didn't have an overboard indicator. If the motor doesn't have a hose off of the exhaust cover going over the top of the motor to the lower pan it can't have a stream. These motor's had a small amount of water coming out of the idle relief ports, back of the motor , 2 holes below the lower pan. The bigest mistake I see when someone does the work themselves, when putting the lower unit back on, the water tube from the powerhead down to the lower unit misses the waterpump housing, causing no water flow to the powerhead. I have done this a few times myself, even after doing 4-5 water pump job's a month, it's not hard to do.

Tom