• Welcome to this website/forum for people interested in the Morgan 38 Sailboat. Many of our members are 'owners' of Morgan 38s, but you don't need to be an owner to Register/Join.

Boom Replacement on M384

mpearson

Mark Pearson
Staff member
Looks like my wife is going to get a new boom for her birthday. Last year she got a new dripless stuffing box for the propeller shaft. She just doesn't seem as excited about her birthdays as she was before we got the boat.

I've given up on our existing (original) boom. The stainless outhaul slider car is fused to the track and won't budge 1 mm despite efforts by myself & two different shipyards, heat & cold treatments, soaking in vinegar, penetrating oils and hammers of all sizes (including vibrating ones).

outhaul.jpg
End of Boom with Stuck Outhaul Slider (Car)

Also the sheaves at the end need to be replaced but the end piece needs to be removed in order to do that. That end piece is also fused/corroded onto the boom. There was apparently corrosion/pitting on the boom and the previous owner painted it. The paint is failing now too.

My first thought was to just get new boom tubing, and use all of the pieces & fittings from my current boom. I can remove them if I'm not worried about destroying the boom tube.

So I called my good friends at Rig Rite. I'm pretty sure they are in the middle of filming a reality show on how to provide really, really bad customer service. Bottom line: they want $1,699 for a 13 ft piece of Kenyon 3756 boom. That's just the tubing and no other fittings, etc.

I had chatted with US Spars folks at the Miami Boat show and gave them my specs. They offered up a complete boom (including all the fittings) for about $1,000. They also offered a boom that has some 'blemishes' for $470 complete with all the fittings. Four times less than Rig Rite's price for just the tube.

They sent me photos of the 'blemishes' and they are minor enough that most people wouldn't even notice them unless they were looking for them.

So I'm placing an order with US Spars and also getting their rigid boom vang. Their service has been outstanding so far. Immediate responses and quite knowledgeable. In stark contrast to Rig Rite. I've decided I'd rather whittle a boom with a pocket knife than give one more dollar to Rig Rite. Their customer service was 10 times worse and their price was over 4 times higher .... Huh?

I will need to grind about 2mm off the thickness of my existing Toggle, but I think a metal shop could do that quite quickly.

In case it helps anyone, below is a sketch I did of our existing boom. Note that we have a 384 and I believe 382s have a different Kenyon spar for their boom.

Boom-Drawing---Raw.png

I'll post how this works out, including photos after I get the new boom.
 
Your boom looks like mine on the 382, in design though not length. Amazing the slider won't budge, but 30 years of corrosion works wonders. I have never heard anything good about RigRite, but neither have I ever used them. Curious they can have that reputation and continue. I have used Rigging Only to replace my standing rigging. Great folks to work with. I would love to come over and see the new boom when it arrives.
 
Mark, I also got the US spars boom. It is the model Z362. I ordered it with 4 jammers in the forward lower section, 7 under boom cars for the vang, main sheet blocks, and three reef points. I had to make an outhaul 7to1 and changed the main to loose footed rather than change the boom slugs. I got the boom with the under boom cars loose in the bottom track so as to be able to fit their positions exactly. I am very happy with the boom.
 
Hi John - sorry for the delay, I've been on a big boat trip ... I'm curious - how did you handle the gooseneck fitting using their Z362? Did you replace the fitting where it attaches to the mast? Or use your existing fitting? If you replaced it, did you have problems getting it off?

Thanks!
 
Mark,

What is the latest on your boom replacement. I am eager to learn more about your installation and your thoughts on the Z362.

Pilgrim needs a new boom. The PO installed a new double spreader rig matches the M383 & 384 specs and moved the main sheet to the cabin top / mid boom. Unfortunately the PO kept the original boom. The original M382 15' boom is not strong enough to handle mid-boom sheeting.

Have found a used boom off a circa 1980 C&C 39 that matches the specs we need for Pilgrim, but the boom needs repainting, new goose neck, new mid mast bails, and likely a new sheave box at the aft end. I'm thinking by the time I buy the parts and do the repair / modification work I would be into the used boom for about what you spent on the new Z362.
 
Hi Jeff - sorry for the delay. We are on a big road trip & almost no time to jump on web.
Our boom replacement went very well. US Spars was a joy to deal with and when we received our "blemished" spar we were very pleased that the blemishes were so tiny you wouldn't even notice them unless you were hunting for them.

It is a joy to have a nice, new shiny boom on Zia. I would for sure do that again rather than stripping, then painting, refitting an old boom.

I'll put some pictures up when I get home. The new boom doesn't look to be as rugged as the original Kenyon spar, but I'm quite sure it is plenty rugged enough for anything I'll need to throw at it.

If anyone needs a gooseneck fitting - I will be cutting mine out of the boom tubing and selling it. It was recently fitted with new sheaves, cams, bolts, and jam cleats from Rig Rite ($240 for that hardware). I'd sell the whole assembly for $200 ... RR sells them for $890. I'll send pictures if you are interested.

Cheers,
-Mark
 
Last edited:
OOPS. Mark, just removed my head from a dark place and realized that the boom sections are different for your 384 and my 382. So, disregard my comment about interest in your gooseneck fitting.


Bill Williams
 
Here are some photos of our new 'blemished' boom from US Spars. I'd give them a 9 or 10 on customer service and I'm very happy with the quality of the boom. It has the newer kind of bales which slide along the bottom track, instead of the old school hoop bales.
Very happy with the value ... way, way less expensive than getting Kenyon spars from Rig Rite.

2015-10-04 17.34.25.jpg

2015-10-04 17.34.42.jpg

2015-10-04 18.21.02.jpg

The fittings (gooseneck & toggle) attaching it to the mast were a little bit tricky. The gooseneck plate which attaches to the mast on Zia was totally fused to the mast. Based on my experience trying to take the old boom apart I'm pretty sure it would have been a nightmare (or impossible) to get it off the mast without messing up the mast.

Below is a photo of the old 'existing' gooseneck fitting (right) and toggle. The gooseneck was very clearly fused to the mast, and almost looked like it had been welded. We decided to avoid that battle.

Old gooseneck.jpg

So we left the gooseneck intact and instead removed the toggle and reworked it a little. It was about 2mm too thick for the US Spar boom, so I took it to a metal shop and they ground off some of the thickness, then welded in some reinforcements to be sure it was very beefy (technical term). That cost $75.

Toggle Rework.jpg

The photo above is our original Toggle. We ground 2mm from the area enclosed by the solid line. And we had a stainless steel welder fill in the area between the two plates enclosed by the dashed & solid lines to add more strength to the toggle.

The photo below shows the new 'revised' toggle at work.

2015-10-04 18.21.26.jpg

We also replaced the slugs on the foot of the sail, which was quite easy & inexpensive.

It is a complete joy to have a shiny new boom with everything functional.

Overall it was a very good experience and if anyone is considering a new boom, I have no problems heartily recommending US Spars. I would also do the 'blemished' spar again since both Zia and her captain are much more blemished than the spar they sent us.

For reference: (remember Zia is a 384 and has different spar sizes than a 382) the US Spars section is Z360 and blemished it cost $470. The internal 4:1 cascading outhaul line & blocks were $105. Packaging and shipping from FL to Oregon was $535. I did all the tapping/screwing myself to re-attach things. I also got a rigid boom vang ($346) which I'll install this winter.

Cheers,
-Mark
 
Last edited:
Time for a reality check.......
I'm seeking quotations for a carbon fibre boom. So far they range from $9700 to $6900.
I have a carbon fiber spinnaker pole which is truly a delight.
So am I nuts?
 
Hi John - yes, I think you are nuts. Full disclosure: I've spent more money than that on things that were nuts and still had fun with them.

I think you get a lot more intimate with a spinnaker pole, constantly moving it using mostly man/woman power. I can see the allure of a super light Spin pole.

The boom, though, is always suspended on other spars/lines. It's not super high so the 'reduce weight aloft' argument doesn't work.

My Aluminum boom doesn't weigh that much - I'm guessing 40 lbs. I'd guess a CF boom might save 10-15 pounds?

In my case, if I had those $$ to blow, I'd go take an exotic vacation for a month at a spa, and lose 10-15 pounds off of me instead;-)

Cheers
Mark
 
KISS-that also means spending reasonable amounts to maintain and improve a boat, that is unless your Trump or Gates.
 
I don't have any direct experience, but I've heard that when lightning strikes a carbon fiber spar it explodes due to the insulating properties of the epoxy.
Other than that and the cost I can't think of a single disadvantage.
 
Steve, A local JBoat, 130 model I think, with a carbon fiber mast was struck by lightening in summer 2014. The owners, fearing the lighting compromised the spar, stepped the mast and had it inspected. Not sure by whom or by what process the mast was inspected, but it was decided by the owners & their insurance company the spar was intact. The mast was re-stepped into the vessel. I think that any mast suffering a direct lightening strike needs to be closely inspected for damage.

John, I agree with Mark on his assessment. Can not see the benefit of spending thousands of additional dollars for the weight loss on the boom.
 
A friend of mine with a 1986 Freedom Cat Ketch was hit by lightening 2 years ago. All his electronics were fried. The insurance paid for all that. This year the bottom 6" of his carbon fiber fore mast has disintegrated. The mast was not inspected after the strike for structural damage. Now the insurance company refuses to pay for the mast to be replaced. He is going to be on the hook for a $40,000 mast. Be sure to choose your surveyor well if you get struck by Mother Nature.

Jim
 
But wait...There's more
The latest quote from Aspire Spars of Cleveland Ohio (aka Tartan Yacht) was for $3920. Our existing boom is a US Spars salvaged from a Beneteau about 20 years ago when we converted the 382 to mid boom sheeting. It's Twice the mass (at times it seems to be made of depleted Uranium) of the end of boom sheeted OEM Kenyon and is way past the replacement time. The Admiral is in favor of it because we double hand in the SF bay and when we de-rig the boat every year the long haul up the ramp to the storage yard is more and more a struggle. Anything can be justified. Photo blog to follow...........
John
 
OK, I've got my Nomex suit on!. It was delivered undamaged in a 5/8" Philippine mahogany crate that weighed almost 100 pounds. I didn't weigh it but the Admiral is able to lift it by herself so that's the metric fulfilled. Jibes are akin to a dinghy. No scratches yet.
 

Attachments

  • Coasties carbon boom.jpg
    Coasties carbon boom.jpg
    2 MB · Views: 45
  • Coasties carbon boom.jpg
    Coasties carbon boom.jpg
    2 MB · Views: 35
What did that boom end up weighing rigged and all? Cost again? ...total with shipping if you don't mind:)
 
I've just yanked it of the boat for the summer anchor out. There is not much hardaware on the boom execpt for exit blocks. The mid boom mainsheet bocks are attached by dogbones inside the boom with dyneema loops sticking out the bottom. Probably have the weight by the week of the 16th. You could will call that at the Taratan Yard just east of Cleveland. Shipping was $650
 
I've just yanked it of the boat for the summer anchor out. There is not much hardaware on the boom execpt for exit blocks. The mid boom mainsheet bocks are attached by dogbones inside the boom with dyneema loops sticking out the bottom. Probably have the weight by the week of the 16th. You could will call that at the Taratan Yard just east of Cleveland. Shipping was $650
Sounds like a nice deal...
 
Back
Top