Home › Forum › Ask A Member › 40hp Johnson 1963 Water Pump › Re: 40hp Johnson 1963 Water Pump
May 5, 2016 at 10:57 pm
#36064
quote FrankR:
One thing about those lights or horns–they come on after the motor is already overheated. If you happen to be running wide open throttle when it comes on due to total pump failure, you have about ten seconds to shut it down–if that.
Read Frank’s words again. He is spot on. The light will tell you that you just smoked the powerhead.
Also, what oil ratio are you planning on running?
I have watched an original impeller come apart in a test tank on an FD engine. Watched the water exiting the block slow then stop. The original impeller was in pieces.
Old original impellers are just not worth taking a chance on, period. Or, to put it another way, impellers are currently available and cheap. Powerheads are not.
Same with running additional oil.