TD20 In-Tank fuel filter (w/screen) pt# 375663???

[aquasonic]

frankr wrote:

aquasonic wrote:

When cleaning out Johnson “T” series tanks, I’ve been using a 1/2″ brass plug to temporarily replace the filter screen fitting for years now. This is done to save the delicate filter screen from damage when shaking the tank with fasteners inside. This plug has worked very well, and that is why it’s a bit confusing.

The brass plug was purchased from a local plumbing supply. Have I unwittingly been using a tapered thread plug all of this time?

Sometimes you don’t know what you don’t know…

 

 

You may not have known the technical what-fors and why-fors, but you must have known there was something different about that thread, which led you to a plumber for a plug.  Experience is a great teacher.

Well, up until you brought this up, I had no idea. My saving grace was that another member recommended the plumbing plug on this forum! I just followed the advice. Always enjoy learning something, though. Thank you, Frank.

[crosbyman]

Time is the best teacher unfortunately it kills it’s students ….:-)

Joining AOMCI has priviledges 🙂

[Mumbles]

Not the finest screen but it keeps sticks and stones out of the system.

 

[John Gragg]

Like I said, I have always been a little perplexed about different threads. Frank gave a good image to look at and for some reason it tickled me enough to go out to the garage and pull out my micrometer.  64 years old and 1st time I was ever shown told the threads on iron pipe got bigger. I’m sure I read it, but didn’t absorb it. Measured the threads. ~1\2″ at the top and ~9|16 at the bottom.

I get it now…

Thx

John Gragg
RIverside, CA

Just starting in the hobby, please be patient.

48 Sea King 5hp GG9014A
49 Sea King 5hp GG9014A
48 Johnson TD20
49 Johnson TD20
54 Johnson QD15
55 Johnson CD12

[The Boat House]

[joecb]

I find that in about all cases the brass screen is so badly corroded and fragile that there is little hope in saving it. If there is screen material left, repairing it by soldering is near impossible because of the corrosion.  I remove the old screen, clean out the brass fitting and make new.  Fine mesh brass screen can be had at craft stores, like Hobby Lobby without having to buy industrial quantities.

Joe B

[aquasonic]

I thought the intake filter screen on a TD is made of stainless-steel mesh. That may explain why John was not successful in soldering it. Maybe someone knows for sure.

Anyway, brass screen is solderable, if you choose that method of repair.

[John Gragg]

John Gragg wrote:

crosbyman wrote:

try  some  SS or galv fly screen … cut a 1″x 2″  rectangle   just  roll it up like a carpet…. pinch the top   and stuff it inside the threaded section. dab the edge with JB  steel weld to hold the screen in place  .  you can get SS screen from a cheap spagetti screener at the dollar store ,,, cut it up… roll it up

done.

or get  brass mesh cloth  from Mcmaster  $$$$

Dang. Of course! JB to the rescue…

That will work splendidly!

Thanks

Best Regards

Update: The “JB Weld” idea worked very well!

1st Picture is of my experimental stainless mesh screen welded at the seam with JB. Let it cure for 7 days, then soaked in Fuel/TCW3 Oil mix for 3 weeks. No degradation of the JB that I can find at all.

2nd picture is of my first attempt at creating a brand new screen on the tank filter fitting. It worked pretty well, although I will not get any awards for it being pretty.

Overall I’m really happy this worked this way. I ordered copper screen that I was able to solder, but the mesh was probably too large to filter much crud out of the fuel so I didn’t go with that. The stainless screen was readily available so I went with it. Glad I did.

Just a quick update in case anyone else is curious. The answer to “Is JB Weld Fuel Proof?” is “Yes, at least for 3 weeks that we know of…” LOL!

 

Best Regards,

 

John Gragg
RIverside, CA

Just starting in the hobby, please be patient.

48 Sea King 5hp GG9014A
49 Sea King 5hp GG9014A
48 Johnson TD20
49 Johnson TD20
54 Johnson QD15
55 Johnson CD12

[Author]

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