Rotating furling boom wanted Mariner 19

Jul 12, 2026
1
O'DAY Mariner 19 Lafayette
I am new to the forum and am purchasing an O'Day Mainer 19 and looking for a furling boom any assistance in finding one would be greatly appreciated.
 

jssailem

SBO Weather and Forecasting Forum Jim & John
Oct 22, 2014
24,589
CAL 35 Cruiser #21 moored EVERETT WA
Did you have a furling main on your laser or Hobie cat?

The Mariner is a small boat with spars to match it’s size. The cost and weight of roller furling mast or boom would add 5-15 K to the boat cost and weight to the air draft that would push the CG above the deck. LeisureFurl & Schaefer Marine both make small boat furling systems. They are designed for boats 26-27 ft and larger.

The Mariner 19’s small rig (P ~23 ft, E ~10 ft) is too compact for practical or cost-effective adaptation. I could find no aftermarket kits, custom builders, or owner reports mention installing main sail furler systems.
 

dLj

.
Mar 23, 2017
5,095
Belliure 41 Back in the Chesapeake
I am new to the forum and am purchasing an O'Day Mainer 19 and looking for a furling boom any assistance in finding one would be greatly appreciated.
That's a pretty small boat to find an off-the-shelf boom furling system.

Years ago I had a trimaran that was close to that size and simply built a boom roller furling system on that boat. I used the original boom, modified the attachment at the mast, modified the way the topping lift attached at the end of the boom and voila! boom roller furling main sail. Probably cost less than $100 in parts (it was long enough ago I don't remember exactly).

dj
 
Jan 11, 2014
14,024
Sabre 362 113 Fair Haven, NY
Let's clarify this, are you looking for a in boom furling system or the old style system where the sail rolls around the boom?
 
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pgandw

.
Oct 14, 2023
234
Stuart (ODay) Mariner 19 Yeopim Creek
The mid-production (I'm not sure about early and late production) Mariners did come with a roller-reefing arrangement where the boom was rotated to reduce the size of the mainsail. The gooseneck permitted (still does on most Mariners) boom rolling by pushing the gooseneck out slightly against a spring so that a round pin was in the boom, and not the square pin. There was also a large boom "claw" to which to attach the main sheet (most Mariners have lost that piece a long time ago). The claw was slid over the boom end after reefing the sail, and then the main sheet attached.

However, the system sucked (and still sucks). You get a terrible reefed sail shape. It takes way too long to accomplish the reef. You lose the ability to use a boom vang - which is really critical on the Mariner to prevent the boom from rising and catching on the backstay during a gybe.

Do your self a big favor, and have a sailmaker install reef points (2 sets if you sail in a windy area like I do) on your mainsail. Then arrange for a hook or use the downhaul to pull the tack down, and a clew reef line to to position the reefing clew on the boom.

The Mariner has a very large mainsail for the size of boat. If you don't have rail meat readily available, you are going to want to reef the main at about 15kts of wind. My Mariner is now set up to allow me to reef underway by heaving to, putting in the reef, and then going on my way. Clew and tack reef lines are pre-rigged when the main is bent on.

The Mariner Class Association (https://usmariner.org/) is a great resource for all things Mariner. Well worth the $15 per year.

Fred W
Stuart (ODay) Mariner #4133 Sweet P
 
Jan 11, 2014
14,024
Sabre 362 113 Fair Haven, NY
My one experience with roller reefing on a boom resulted in us being stranded in the dark on a break wall. The CG came and picked us up and towed the boat back to shore. Never again!