10hp Johnson.

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John8504
Posts: 132
Joined: Mon Apr 02, 2018 9:39 pm

Re: 10hp Johnson.

Postby John8504 » Wed May 16, 2018 2:31 pm

Updated pics of tank above. Looks new inside
Bringing them back with a little TLC.

bobw
Posts: 272
Joined: Sun Jan 22, 2017 8:21 pm

Re: 10hp Johnson.

Postby bobw » Wed May 16, 2018 2:42 pm

That's not a 2-line pressure tank and won't work with that motor unless you plan to convert the motor to run on a single line standard tank like that. Still, $20 for that tank is a good deal - it looks to be in great shape. The fuel pump conversion on that motor is easy to do.
Bob
AOMCI Member

1954 Johnson CD-11
1958 Johnson QD-19
1972 Evinrude 25202

John8504
Posts: 132
Joined: Mon Apr 02, 2018 9:39 pm

Re: 10hp Johnson.

Postby John8504 » Wed May 16, 2018 2:43 pm

With the fuel pump conversion, will it run on a single line? Also where would I get the conversion kit?
Bringing them back with a little TLC.

bobw
Posts: 272
Joined: Sun Jan 22, 2017 8:21 pm

Re: 10hp Johnson.

Postby bobw » Wed May 16, 2018 2:50 pm

Yes, if you do the fuel pump conversion it will run on a standard single line tank. There is no conversion "kit" per se, but you can look on utube or do a google search for "OMC fuel pump conversion" and you can find out how to do it. There are 2 different options on how to modify the motor intake to make it work - you can find both options on utube. Or maybe another member has a video or written instructions on how it's done.
Bob
AOMCI Member

1954 Johnson CD-11
1958 Johnson QD-19
1972 Evinrude 25202

John8504
Posts: 132
Joined: Mon Apr 02, 2018 9:39 pm

Re: 10hp Johnson.

Postby John8504 » Wed May 16, 2018 3:04 pm

Sound so great
Bringing them back with a little TLC.

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Mumbles
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Location: Victoria BC

Re: 10hp Johnson.

Postby Mumbles » Wed May 16, 2018 3:12 pm

The easiest way to mount a fuel pump would be to find a '60-'63 bypass cover with the pump mount already made into it. A common small square pump as found on 9.9/15 horse motors will feed your ten no problem. These bypass covers came with either a high or low mounting point for the pump but it doesn't make any difference which one you use.
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bobw
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Re: 10hp Johnson.

Postby bobw » Wed May 16, 2018 3:41 pm

Good suggestion Mumbles. Didn't even think of that solution. Was thinking about how I had to modify my 1954 5.5hp with no bypass covers. The bypass cover mod is the easiest way to go for sure.
Bob
AOMCI Member

1954 Johnson CD-11
1958 Johnson QD-19
1972 Evinrude 25202

FrankR
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Joined: Tue Mar 10, 2015 6:32 pm
Location: Florida

Re: 10hp Johnson.

Postby FrankR » Wed May 16, 2018 3:49 pm

If you want to take the time to be creative, you can make an adapter plate to go over the existing bypass cover. I used to make some, but quit due to lack of interest.

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Garry in Tampa
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Location: Florida

Re: 10hp Johnson.

Postby Garry in Tampa » Wed May 16, 2018 11:41 pm

I converted a five horse I had in for an overhaul (which included oversize pistons and rings) by drilling through the upper top and bottom exhaust ports. I used modified counter sunk headed screws inside the bypass to screw a quarter inch aluminum plate like Frank made to the side of the engine. I retained the 4 gallon tank, caping off the manifold pressure nipple and zip tied the hose to the starter support bracket on the intake manifold to act as an air vent. That way he always had the proper fuel / oil ratio for the five horse Fisherman. . . 8-)
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Living my dream because Reality is too expensive . . .

bobw
Posts: 272
Joined: Sun Jan 22, 2017 8:21 pm

Re: 10hp Johnson.

Postby bobw » Wed May 16, 2018 11:58 pm

I'm still relatively new at restoring these old motors and like that line in one of Clint Eastwood's old Dirty Harry movies, "a man's got to know his limitations". I know I'm not ready yet to attempt that kind of conversion but it sure sounds interesting.
Bob
AOMCI Member

1954 Johnson CD-11
1958 Johnson QD-19
1972 Evinrude 25202


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