Stuck Lid on Raw Water Strainer MS 400

[welippisch]

Hi, everyone. New to me 2007 MS 400. Tried to remove the lids on both the engine and generator Water Strainer on the first outing without success. Is there a special tool that fits the center square and wings?

 

[Gmarr]

Called a spanner wrench. Once you get it off, check the o ring and put some silicon grease around it as well.

 

[Gmarr]

https://www.westmarine.com/buy/groc...fPU2l9AB2_OY6h9zmbPq6BUlVGJ4HOWBoC1L4QAvD_BwE

 

[RT Firefly]

Greetings,
Mr. w. Welcome aboard. Nope. Sorry Mr. Gm. No spanner wrench for this lid. Get a large flat wrench, put it flat on top, turn counter clockwise, the wrench will engage in the ears/tabs sticking up and give you the leverage. If REALLY stuck, go the penetrating oil/gentle heat route.

 

[welippisch]

Thank you very much. Looked at the Grocco spanner wrench and could not figure out how it would work. Looks like a job for PB Blaster and patience.

 

[Gmarr]

Ahhh now I put my glasses on. It only looks like mine! Thanks RT

 

[OldDan1943]

https://www.westmarine.com/buy/groc...fPU2l9AB2_OY6h9zmbPq6BUlVGJ4HOWBoC1L4QAvD_BwE

The one in the picture is for deck fitting and the old time Groco filters.

I have used a open end wrench on the ear and the bar of the wrench on the other ear and strain myself loosening it, making sure nothing slips off. Once off, check the o-ring and load the threads with anti-seize grease and remember to finger tight.

 

[menzies]

Close the through hull. Put a wrench across the raised notches and lightly tap the end of the wrench with a rubber mallet (of which you should have two or three sizes on board). Increase tap pressure until it moves.

If you don't have enough room for a horizontal tap, put one lip of a wrench on a raised notch and tap with the mallet more vertically.

 

[RT Firefly]

Mr. Gm.

 

[fletch]

PB Blaster, wait a while and a modest heat gun (not a torch) would be my suggestion, I would also suggest replacing the o-ring and silicone lube after, BTW heat the body not the cap.

 

[Northern Spy]

Chunk of flat bar across the flats and tap with hammer.

 

[syjos]

Second on flat bar.

 

[fletch]

Like the flat bar and tap, I would still PB and heat a bit

 

[grahamdouglass]

Old groco filters

Don’t forget the neversieze when you put the lid back on

 

[greysailor]

don’t forget the neversieze when you put the lid back on

?

 

[menzies]

?
View attachment 89692

You lose your heart?

 

[psneeld]

I don't recommend just any antisieze....


Some contain metals that are incompatible in the saltwater environment.


A dielectric silicone, which is often aboard is find and good for the gasket much of the time.

 

[kchace]

Neverseize would work, but man is it messy and as Psneeld says, you need to use one that is saltwater compatible. For bolt threads in the boat, I use the nickle based neverseize. For threaded fittings like this, I use the red marine "waterproof" grease.


Ken

 

[jleonard]

I use grease on the threads. Always come apart with a light tap.

 

[greysailor]

You lose your heart?

Ha! No....but a teaspoon of NS will paint a battleship!

 

[DrWelsh]

I have a MS 430...just purchased and had the same problem. I used a large channel lock to take them off. Get one large enough to easily go around the lid.

John Welsh

 

[garychurch]

Been there... Agree with menzies approach. Sometimes you need a lot of tapping to eventually loosen. Once removed lubricate the o-ring as mentioned and hand tighten only. Just don’t wait too long (month or two) to reopen or you will have to go through the protracted effort again.

 

[Rhodewaves]

Use a ratchet wrench , spray it with wd40 first