Re: 1956 Johnson 10HO QD 19 exhaust housing temp

[Leon]

Well, one thing I have noticed, is the drain holes on these older motors are pretty small. They tend to plug up too easily and you have to keep after them. This is a new case to me, though. In 25+ years of outboard tinkering, I have never heard of that drain hole. It might be beneficial to open it up a bit, to reduce the clogging potential, wouldn’t it? I see later motors went up to 1/4" or bigger, for gearcases. Not many late models clog up anymore. It would be worth it, to look into this option. Carbon works quickly, clogging up holes that small.