USING LIFTING EYES WITH BOAT HOIST

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JimDavis
Posts: 36
Joined: Fri Jan 01, 2010 8:40 pm
Boat Year: 2006
Boat Mfg: World Cat
Boat Model: SF-230
Location: Santa Rosa Beach, FL

USING LIFTING EYES WITH BOAT HOIST

Postby JimDavis » Mon Jan 25, 2010 9:55 pm

I would like to hear of World Cat owners' experiences, either good or bad, with the factory installed lifting eyes on a 2006 Model SF230 with twin Honda 150s. I am estimating a maximum total weight of 5,600#, fully loaded, with 1,700# being distributed to each of the 2 transom eyes and 2,200# to the single bow eye. I am finishing up a covered slip and dock in a very shallow water area of the bay where I will usually not have enough water depth to use a conventional cradle under the hull. I have tentatively configured a single electric motor hoist with 3 cables winding on a single 2" pipe with cable winder guides. The cables will drop to the 3 factory installed lifting eyes. Each time the boat is lifted to full height above the water, I will position 12" wide web slings under the hull, fore and aft, and then lower her onto the slings (which will be hanging from adjacent pilings) so that the weight is not long-term supported only by the lifting eyes.

I am told these eyes are routinely used to move bare hulls around the factory and are obviously plenty adequate for that application, but what about a fully fueled boat with gear and engines? Has anyone ever had the eyes break off or pull out? And might there be any likelihood of damaging the hull if the boat remained hanging by the eyes for an extended period of time? Any constructive feedback from other WC owners will be much appreciated.
Late 2006 SF-230 w/Honda 150's
On Chocktawhatchee Bay at Santa Rosa Beach
Fishing out of Destin and Panama City, FL

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DAY_OFF
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Re: USING LIFTING EYES WITH BOAT HOIST

Postby DAY_OFF » Tue Jan 26, 2010 7:30 am

I hung mine loaded overnight and stood underneath and painted it. No moans or groans.

The rear straps did rub the motor hoods with the motors trimmed full up. This might "wear" on the Honda paint if done repeatedly. I just didn't want to get a face full of prop.
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2005 250 DC, 150 Hondas, Garmin 741XS, Simrad AP16,
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Pierless
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Boat Model: 290DC

Re: USING LIFTING EYES WITH BOAT HOIST

Postby Pierless » Tue Jan 26, 2010 2:02 pm

Day_Off: this is not a comment about factory specs. Can I suggest the next time you go under your boat there is backup support. maybe the hull is on blocks in addition to hanging from above. Accidents can happen and I want you to keep on boating.
2008 290DC w/Zuke 250s
Ray E120W unit with ST70 autopilot; Ray 125 GPS; DSM 300 sounder & Airmar M260 ducer; Ray 424 4kW radar; Ray 218 VHF; SR100; Rupp Z-30 outriggers & center rigger

JimDavis
Posts: 36
Joined: Fri Jan 01, 2010 8:40 pm
Boat Year: 2006
Boat Mfg: World Cat
Boat Model: SF-230
Location: Santa Rosa Beach, FL

Re: USING LIFTING EYES WITH BOAT HOIST

Postby JimDavis » Tue Jan 26, 2010 8:39 pm

Thanks for the feedback Day-Off. I notice current listed dry weight of 250DC is almost 6,000 # (probably over 7k fully loaded) and lifting eyes are quite likely the same on both models.
Late 2006 SF-230 w/Honda 150's
On Chocktawhatchee Bay at Santa Rosa Beach
Fishing out of Destin and Panama City, FL

Current Obsession
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Joined: Wed May 06, 2009 7:33 pm
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Boat Model: 250DC
Location: Fort Lauderdale/Tavernier, Florida

Re: USING LIFTING EYES WITH BOAT HOIST

Postby Current Obsession » Wed Jan 27, 2010 12:14 pm

I have a 2008 250 DC which I lift with and store on davits and use the factory installed lifting eye at the bow and the eyes on the stern. So far I have not had any problems.
Current Obsession 2008 World Cat 250DC w/Yamaha 150's and Garman 4210 Chartplotter, XM Weather, Sonar,18HD Radar and Autopilot

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JimC
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Re: USING LIFTING EYES WITH BOAT HOIST

Postby JimC » Thu Jan 28, 2010 6:22 pm

Call or email the factory.
SOLD~ 98 266SC, 200 optimax's, Custom top extension, Custom dive platform w/automatic ladder, side cabin rod holders, twin transom mount, triple tank/dbl gun holder, Raymarine DS500X, 2-VHF's, Lowrance lmf-400 fuel managment

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JimDavis
Posts: 36
Joined: Fri Jan 01, 2010 8:40 pm
Boat Year: 2006
Boat Mfg: World Cat
Boat Model: SF-230
Location: Santa Rosa Beach, FL

Re: USING LIFTING EYES WITH BOAT HOIST

Postby JimDavis » Sat Jan 30, 2010 9:38 pm

Jim, Day-Off and Current Obsession,
Thanks for your input. By way of update since my original posting, I have in fact spoken with an individual from the factory who says he thinks there should not be a problem although admittedly they are only handling boats with no engines and no loads of fuel, gear, etc. I also noticed the transom eyes are oriented such as to line up best for a "3 point pick-up" sling arrangement which would also serve to indicate they were installed primarily for the purpose of lifting without engines. The transom eyes would be more severely loaded in a typical boathouse or davit lifting situation as the cables will be putting more of a lateral strain on the eyes.
I was also told the original eyes were supplied by "EPCO Marine Products Company" (http://www.epcomarineproducts.com). On their website there is a link to a test report provided by Purdue University that gives load test results for three different pulling directions on each of 4 different size eyes of both type 316 and type 304 stainless steel.. The eyes on my SF230 are of the 0.446" diameter size which was designated as sample No. 164 in the test report. Breaking strengths were lower for the type 316 and ranged from 29,900# in a "straight" tensile pull to a low of only 3,500 # in a "side" pull.

EPCO offers a heavier duty eye (5/8" diameter) which is stronger. If you look at the test report, you will notice that the test results are not exactly what one should expect in that the strengths are not all that consistently proportional to cross sectional areas.
In summary, I have about decided to rely more on real world experience than on the manufacturer's claims and test reports. I would be interested to hear from Day-Off and Current Obsession as to WHAT SIZE are the lifting eyes (cross sectional diameter) on your 250DCs. If they are same size (0.446") as my SF230 rather than the larger 5/8" size, I would be a little more certain I'm not pushing the limit.
Jim Davis
Late 2006 SF-230 w/Honda 150's
On Chocktawhatchee Bay at Santa Rosa Beach
Fishing out of Destin and Panama City, FL

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JimC
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Re: USING LIFTING EYES WITH BOAT HOIST

Postby JimC » Sat Jan 30, 2010 10:12 pm

JimDavis wrote:. Breaking strengths were lower for the type 316 and ranged from 29,900# in a "straight" tensile pull to a low of only 3,500 # in a "side" pull.



According to the factory specs your 230 SF dry w/150's is app 5400. Add 1500lb to that and your around 7000 for the whole boat, granted more weight is in the back half, but still under there rating. I would be more concerned about the strength of the transom.
SOLD~ 98 266SC, 200 optimax's, Custom top extension, Custom dive platform w/automatic ladder, side cabin rod holders, twin transom mount, triple tank/dbl gun holder, Raymarine DS500X, 2-VHF's, Lowrance lmf-400 fuel managment

2011 AmeraCat 31 XP

Current Obsession
Posts: 14
Joined: Wed May 06, 2009 7:33 pm
Boat Year: 2008
Boat Mfg: World Cat
Boat Model: 250DC
Location: Fort Lauderdale/Tavernier, Florida

Re: USING LIFTING EYES WITH BOAT HOIST

Postby Current Obsession » Sun Jan 31, 2010 3:12 pm

I won't be near my boat until next weekend to check the diameter. Attached is a photo of the boat hanging on the davits.
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Boat on davits
Current Obsession 2008 World Cat 250DC w/Yamaha 150's and Garman 4210 Chartplotter, XM Weather, Sonar,18HD Radar and Autopilot

JimDavis
Posts: 36
Joined: Fri Jan 01, 2010 8:40 pm
Boat Year: 2006
Boat Mfg: World Cat
Boat Model: SF-230
Location: Santa Rosa Beach, FL

Re: USING LIFTING EYES WITH BOAT HOIST

Postby JimDavis » Sun Jan 31, 2010 7:24 pm

Jim,
According to the factory specs your 230 SF dry w/150's is app 5400
I reckon the current model SF230 is heavier for some reason that I haven't heard explained; the specs on my 2006 model indicate dry weight (no engines) of only 3400 #. Either way, I agree the transom strength should be considered; eyes could impose excessive stresses on the hull before the eyes themselves fail.
I notice CURRENT OBSESSION apparently leaves his 250DC permanently suspended under the davits , which should be a pretty conclusive proof of the adequacy of the eyes if there are no signs of stress cracking or hull deformation. I do know for sure the previous owner of my SF230 also used davits but he would swing the arms around and set the hull down on styrofoam blocks. Possibly the most convincing indication of the strength of the whole system will be confirmation that the u-bolt/eyes on the 250DC are of the same diameter bar stock as those on the 230; i.e. 0.446". I'll be anxiously awaiting to hear back from CURRENT OBSESSION on that issue.
Late 2006 SF-230 w/Honda 150's
On Chocktawhatchee Bay at Santa Rosa Beach
Fishing out of Destin and Panama City, FL


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