Oops…My armature plate doesn’t fit.

[Dave]

I have been working on a 1957 Johnson QD18 10hp. I rebuilt the powerhead. As I tried to replace the armature plate that the coils are installed on, I found that it won’t fit easily over the end of the crankcase. I think I can get it to fit on the top of my powerhead but once on it certainly will not move or advance as the throttle is opened. I know that the plate should move freely.

This is my first time working on an outboard, first time rebuilding a powerhead. I think that there must be an issue with how I re-assembled the crankcase, and the two halves are not mated as they should be. Can anyone think of another reason the coil plate doesn’t fit easily

'57 Johnson QD18 10hp
'53 Sea King 3hp

[Dave]

Well it looks like I jumped the gun. Both the plate opening and the crankcase shoulder, after a good cleaning and buffing are now fitting just fine…Whew!

'57 Johnson QD18 10hp
'53 Sea King 3hp

[crosbyman]

got a copy of the johnson  bible aka  RED BOOK  to work on your oldy  ?

https://watercraftmanuals.com/outboard/johnson/manuals/johnson-302231.htm

 

Joining AOMCI has priviledges 🙂

[Bob Wight]

One thing you need to check – it looks in your pictures you may have the lower retaining ring installed upside down.   The flat side of the ring faces up with the beveled edge side of the ring facing down toward the crankcase.

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

“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."

[William MacNeill]

I shared a link to my google drive for anyone that may need a copy of the manual

 

https://drive.google.com/file/d/1ENXLxO2Z6p4oSkQmJYOsRszO4U8Sfvnj/view?usp=drive_link

[aquasonic]

Bob Wight wrote:

One thing you need to check – it looks in your pictures you may have the lower retaining ring installed upside down.   The flat side of the ring faces up with the beveled edge side of the ring facing down toward the crankcase.

Unfortunately, many of the parts manuals that I’ve seen mistakenly show the retaining ring upside down.

Improvise-Adapt-Overcome

[Bob Wight]

aquasonic wrote:

Bob Wight wrote:

One thing you need to check – it looks in your pictures you may have the lower retaining ring installed upside down.   The flat side of the ring faces up with the beveled edge side of the ring facing down toward the crankcase.

Unfortunately, many of the parts manuals that I’ve seen mistakenly show the retaining ring upside down.

Indeed they do.  I made a random search through a number of my OMC parts manuals and probably half of the diagrams show the ring upside down.

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

“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."

[John Gragg]

I found the same issue (the hard, water-in-the-gearcase way) on the gearcase to exhaust housing gasket on my TD20. Ugh!

John Gragg
RIverside, CA

Just starting in the hobby, please be patient.

48 Sea King 5hp GG9014A. Sold
49 Sea King 5hp GG9014A
48 Johnson TD20. Sold
49 Johnson TD20. Sold
54 Johnson QD15. Sold
55 Johnson CD12. Sold
57 Johnson RJE-19M
57 Johnson RDE-19

[Dave]

Thanks,

I will check that and correct it if indeed I have it in upside down.

 

'57 Johnson QD18 10hp
'53 Sea King 3hp

[Author]

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