1988 10M Mid Cabin Triangle Shaft Log

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Scott67
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1988 10M Mid Cabin Triangle Shaft Log

Post by Scott67 »

Hello all,
Looking for a part number/manufacturer of the shaft log in the subject boat.

Bob,
Any resources from end please?
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"Speakeasy"
1988 Intl 10 Meter Mid-Cabin Exp
Model 340
Twin 454 (350hp) Crusaders
1.5:1 Gearboxes
Jacksonville, FL

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Re: 1988 10M Mid Cabin Triangle Shaft Log

Post by prowlersfish »

Give Bob a call at beacon marine.
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77/78 TROJAN F36 Conv.
6BTA Cummins diesels
Life is to short for a ugly boat :D

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Re: 1988 10M Mid Cabin Triangle Shaft Log

Post by BeaconMarineBob »

We have the shaft log, stuffing box, shaft log hose split coupling or just parts for it.

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609 713 4602
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Scott67
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Re: 1988 10M Mid Cabin Triangle Shaft Log

Post by Scott67 »

Bob,
Thanks for the info. Just to be clear, it appears that the stainless bolts (poor choice of fasteners in my opinion) are threaded into the backing plate of the shaft log, is that correct? Has anyone found a suitable replacement for these shaft logs that allows a drop in replacement (same bolt pattern) and the use of bronze carriage bolts inserted from the outside through the flange plate?

Thanks!
"Speakeasy"
1988 Intl 10 Meter Mid-Cabin Exp
Model 340
Twin 454 (350hp) Crusaders
1.5:1 Gearboxes
Jacksonville, FL

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prowlersfish
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Re: 1988 10M Mid Cabin Triangle Shaft Log

Post by prowlersfish »

Scott67 wrote:
Thu Jan 06, 2022 2:45 pm
Bob,
Thanks for the info. Just to be clear, it appears that the stainless bolts (poor choice of fasteners in my opinion) are threaded into the backing plate of the shaft log, is that correct? Has anyone found a suitable replacement for these shaft logs that allows a drop in replacement (same bolt pattern) and the use of bronze carriage bolts inserted from the outside through the flange plate?

Thanks!
You could use bronze bolts in place of the SS if that's what you wanted. I don't see any advantage of using carriage bolts. The bolts go into the shaft log for the inside of the boat. The shaft log goes in from the outside.
Boating is good for the soul
77/78 TROJAN F36 Conv.
6BTA Cummins diesels
Life is to short for a ugly boat :D

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Scott67
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Re: 1988 10M Mid Cabin Triangle Shaft Log

Post by Scott67 »

prowlersfish wrote:
Thu Jan 06, 2022 3:02 pm
Scott67 wrote:
Thu Jan 06, 2022 2:45 pm
Bob,
Thanks for the info. Just to be clear, it appears that the stainless bolts (poor choice of fasteners in my opinion) are threaded into the backing plate of the shaft log, is that correct? Has anyone found a suitable replacement for these shaft logs that allows a drop in replacement (same bolt pattern) and the use of bronze carriage bolts inserted from the outside through the flange plate?

Thanks!
You could use bronze bolts in place of the SS if that's what you wanted. I don't see any advantage of using carriage bolts. The bolts go into the shaft log for the inside of the boat. The shaft log goes in from the outside.
Prowlerfish,
I'm aware of the orientation of the fasteners and the shaft log and the backing plate, which is exactly the issue for me. On a lot of newer style logs the bolts are inserted from the outside and held in place from spinning by means of the carriage feature integrated into the log flange. This allows one person to tighten the nuts that secure the backing plate from the inside (not that I care about that feature, but it's nice). It also affords the ability to remove one of the nuts from the inside in the event one needs to clean or replace the bonding connection. The current configuration does not afford this advantage without having to completely remove the bolt and introduce water inside. Or in my case, the stainless steel fasteners that were used have suffered the usual crevice corrosion and as such, one of the bolt heads have snapped off despite my ginger efforts in removing the same.
Since the bolts are threaded into the log flange and are now frozen in place, I don't have the option of just using a center punch and driving the fouled bolt out of the log, a feature that would be handy with carriage bolts. Instead, I have to remove the entire log from the hull that's been in place since forever to remove the stuck bolt from the flange. Since I have to go down this road, I figure I would change the outdated shaft logs out to something a little more maintenance friendly for the next time.
"Speakeasy"
1988 Intl 10 Meter Mid-Cabin Exp
Model 340
Twin 454 (350hp) Crusaders
1.5:1 Gearboxes
Jacksonville, FL

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prowlersfish
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Re: 1988 10M Mid Cabin Triangle Shaft Log

Post by prowlersfish »

Well you did get 33 years out of the set up. I can't find any in that shape that take carriage bolts, I guess a marine shop could machine the log to take carriage bolts. For myself, I am fine with the setup but it's your boat so do it the way you would prefer.
Boating is good for the soul
77/78 TROJAN F36 Conv.
6BTA Cummins diesels
Life is to short for a ugly boat :D

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Scott67
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Re: 1988 10M Mid Cabin Triangle Shaft Log

Post by Scott67 »

prowlersfish wrote:
Fri Jan 07, 2022 12:15 pm
Well you did get 33 years out of the set up. I can't find any in that shape that take carriage bolts, I guess a marine shop could machine the log to take carriage bolts. For myself, I am fine with the setup but it's your boat so do it the way you would prefer.
You are correct, but now here we are 33 years later. I'm just looking to improve the set-up for the next 33 years. However, let me show you a couple of examples of what I was referring to, they are more prevalent than you might think:

https://www.greatlakesskipper.com/north ... -shaft-log
https://www.greatlakesskipper.com/tiara ... king-plate
https://www.deepblueyachtsupply.com/136 ... DQQAvD_BwE
"Speakeasy"
1988 Intl 10 Meter Mid-Cabin Exp
Model 340
Twin 454 (350hp) Crusaders
1.5:1 Gearboxes
Jacksonville, FL

User avatar
prowlersfish
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Re: 1988 10M Mid Cabin Triangle Shaft Log

Post by prowlersfish »

Well if one of those fit go for it. ( one at beep blue is too big but they may have others)
Boating is good for the soul
77/78 TROJAN F36 Conv.
6BTA Cummins diesels
Life is to short for a ugly boat :D

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