Reply To: 1955 Johnson not cooling

[Bob Wight]

Can you see any water discharging from the blubber hole on the back of the motor?   Some things to look at:   Did you seal the impeller plate to the gearcase housing, if not the pump may not pump water correctly.   When you replaced the impeller, was the old impeller intact or were pieces broken off/missing?   Maybe a piece of the old impeller or some other obstruction in the water tube from the pump up to the powerhead.   Maybe an obstruction somewhere in the water jackets in the powerhead.    When you replaced the impeller did you also replace the impeller plate and pump housing?   Sometimes a new impeller with an old impeller plate or old pump housing won’t pump correctly.   Did you look to see if the air bleed hole in the pump housing was clear and not blocked?

Bob

1937 Champion D2C Deluxe Lite Twin
1954 Johnson CD-11
1955 Johnson QD-16
1957 Evinrude Fastwin 18
1957 Evinrude 3022
1958 Johnson QD-19
1958 Johnson FD-12
1959 Johnson QD-20
1982 Evinrude 25hp

“Every 20 minute job is only a broken bolt away from a 3-day project.”
"Every time you remove a broken or seized bolt an angel gets his wings."