Sealine 300H / 50H gear swap

Started by Decker, November 13, 2025, 04:32:02 PM

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Decker

Greg, I had thought previously that the bridge was stainless steel, but it's chromed brass I think.  Not as hard as might be assumed, but who knows how it happened...

I'm all set with the sleeve, thanks. Bought one that Cortez makes for the Daiwa Sealine reels.

Decker

#16
Completed the 5-stack drag and put her back together, finally!

One concern, the last eared washer was laying dead even with the top of the main gear. When assembling the bridge that washer could easily have slipped so that the ears are not in the slots. How would I know?  How would I prevent it the next time? 

The reel feels good, cranks good, and the drag seems to be working. Now it needs tested!  How do you tuna-test a reel in your backyard?  Need to make sure it is smooth and get a number. 

I reely-reely like the 300H form factor, and I bought some extra parts to make multiple 50H/300H 5 stacks.  Thinking of doing a 350H and a 50H.  More on that later. 


With the orange braid it is a Halloween beast.  Recently I went out of Eastman's Docks in New Hampshire. Can't wait to try this reel out in the Gulf of Maine.

Is this project worthy of the esteemed Tani wrench?

P.S. Here is the thread for building the handle:  https://alantani.com/index.php/topic,40429.  It's a Shimano handle that I filed to fit, and it fits well.

Decker

Hey, could I have some attention  here?  I actually finished a reel upgrade!

JasonGotaProblem

That's awesome. Most drag upgrades I participate in find the top eared washer flush with the main, that just means you efficiently used all the space. If there was more clearance I'd probably try to make it a 7 stack.

The project isn't finished til you land something. I say this as the owner of many unfinished projects.
Any machine is a smoke machine if you use it wrong enough.