Pre-war Mercury/Wizard gear cases
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I have taken 2 of these gear cases apart in the last few weeks and have noticed some similarities and some differences in them from model to model. One is a 1940 (mercury) sea king and the other is a 1940 K3.
This is the water pump/gear case of my 1940 sea king (Mercury K1). Couldn’t get the water pump cover off so I lost my patience and drilled holes, installed screws, added dish soap and it came out pretty easily after that.
Couldn’t get the water pump cam pin out on this one, so I figure it really doesn’t matter. As long as the pin is in there allowing the prop shaft to turn the cam, then the rubber oscillator will rotate and pump water.
Removing this pin was must have been problematic because in later water pump housings they added a small recess to allow the pin to be driven out easier. (See pics below)
Can you think of any reason why it would be essential that I get that pin out?
Thanks!
ScottAny reason I shouldn’t use this oscillator style impeller? It has a small chunk out of it but still rotates. Problem may be that the small chunks are plugging the cooling lines somewhere. After I get it running I’ll see if it pumps water ok.
Bob, I remember you said someone made reproduction oscillator style impellers. Can you refresh my memory who that was? Was it Joe Poole?
Club member Brian Wilcox makes some, but I don’t know if that includes Merc/Wizard
Yes,
here is the link.
http://fergusonpoolemarine.com/enginecoolingsystem.html
It’s my thought that the rubber must still have some give? softness
for this style of pump to work correctly! All of mine are as hard
As hockey pucks.Yes,
here is the link.
http://fergusonpoolemarine.com/enginecoolingsystem.html
It’s my thought that the rubber must still have some give? softness
for this style of pump to work correctly! All of mine are as hard
As hockey pucks.Hmm…I guess I hadn’t thought of that Bob. I wouldn’t think the softness of the rubber would matter as much as with the rotax type impellers with vanes which need to bend and stay flexible.
When I get it all back together, I’ll see how these pump water. Even the kd4 I took apart last week has an oscillator type impeller. The water pump housing is a 7 slit type but would not accommodate a vane type impeller. Maybe it’s a pretty early kd4. I will look at the serial number and see what it says.
EDIT: the kd4 is #123829 so it’s a kd4-1 and part of the first big batch of kd4s they made in 1946. Probably used up kb housings before they moved onto the 3 slit type and rotax impellers.
The early pattern (16 square hole) water pump keep teaching me lessons. I believed they only came with iron or steel eccentric cam.
I will be dining on crow, ran into a brass eccentric cam that is NOT a
from a later pattern (7 slit) water pump.
Salt and pepper, but, no butter I am trying to lose weight. Not much nutrition in crow and its taste leaves a lot to be desired. Excellent
remedy for a swelled head.
Louis
Cam on left is from a 7 slit water pump
Cam on right is brass, but, clearly for early pattern (16 square hole) pump.
edit
Today I got curious and ambitious. The four 16 square hole water pumps were removed, taken apart and are now getting tune up.
Just for the record two had iron/steel eccentric cams, one had a brass
version and the remaing pump will be assembled using an eccentric
cam from a 7 slit water pump.
LouisAll is well that ends well…sort of…as with many old Merc projects, things go well until you run out of parts or patience.
EGG prop nuts, spring to retain eccentric can drive pin and warm temps
to go outside to paint.
I often tear into multiple items at once. The advantage is some are likely
to be complete and serve as a reference to complete the remainder.
The empty water pump casting took a little doing as the original type
eccentric cam was not available. Mr. Grubb came to rescue with the later eccentric cam and assurance that it could be used instead. The
bacl up plan to fire up the lathe was not needed.
The later eccentric cam can be adapted to work with the rubber clutch
or sheer pin.
Sharp eyes will note a 3 slit vane type water pump assembly and a
later pattern propeller on a 16 square hole water pump. I have a
damaged early pattern propeller that needs some careful metal
work to be made usable. I am too cheap to throw away anything that
can be salvaged with more time and effort than most would consider
sensible.
LouisLouis nice look’en parts there! Does this mean we will hear one of those Wizards growl this summer?
dale
Possibly, depending on how long “virus house arrest ” lasts.
Being cooped up with a lot of almost ready projects may work
wonders .The water pumps were removed from several work in
progress motors and will be reinstalled tonight.
LouisPump Info
.
Notice the spring in second video?
That is why I feel the rubber must have some compliance
to it, in order to act like the spring?https://www.apexequipmentltd.com/hollow-disc-pumps/
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