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JR Marine Stainless U-Bolt Better then Stock???? Bravo 3

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JR Marine Stainless U-Bolt Better then Stock???? Bravo 3

Old 06-16-2020, 08:53 PM
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Here are the U bolt part numbers
10-805164 which is 3/8". Same size as JR Marine

10-866324 which is 7/16".
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Old 06-16-2020, 10:16 PM
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Then buy the merc part and save your $20...that amount of money is so insignificant in boating I wouldn’t even think twice about what part I got.

our boat probably burns $20 worth of fuel just idling out of the marina...hahaha
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Old 06-16-2020, 11:16 PM
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Originally Posted by zz28zz View Post
I had great luck ordering from JR Marine and Ron was great. I did however have an issue with one of the 3/8" stainless u-bolts. Installed just fine using torque wrench, but needed to remove for some reason. Nut backed off abt 1/2 of a turn then siezed big time. Would not turn in either direction. Had to use a large breaker bar to snap the u-bolt. Re-installed the orig and called it good. The SS u-bolt one on the other drive worked fine.

Something about using SS nuts on SS bolts causes problems in some situations. We see this problem at work too where we have large SS bolts screwing into large stainless structures.
Did you use anti seize? If not, it is a must on stainless. It will prevent it from galling.
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Old 06-17-2020, 06:42 AM
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Originally Posted by 1MOSES1 View Post
Then buy the merc part and save your $20...that amount of money is so insignificant in boating I wouldn’t even think twice about what part I got.

our boat probably burns $20 worth of fuel just idling out of the marina...hahaha
The amount of work, time and money that goes into changing that u-bolt could let you idle in your marina all day .... if thats your thing

just ask this guy

Originally Posted by zz28zz View Post
I had great luck ordering from JR Marine and Ron was great. I did however have an issue with one of the 3/8" stainless u-bolts. Installed just fine using torque wrench, but needed to remove for some reason. Nut backed off abt 1/2 of a turn then siezed big time. Would not turn in either direction. Had to use a large breaker bar to snap the u-bolt. Re-installed the orig and called it good. The SS u-bolt one on the other drive worked fine.

Something about using SS nuts on SS bolts causes problems in some situations. We see this problem at work too where we have large SS bolts screwing into large stainless structures.
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Last edited by picturethis; 06-17-2020 at 06:48 AM.
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Old 06-17-2020, 01:44 PM
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Originally Posted by picturethis View Post
The amount of work, time and money that goes into changing that u-bolt could let you idle in your marina all day .... if thats your thing

just ask this guy

bahahahaha that job is a cake walk.
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Old 06-17-2020, 10:47 PM
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Originally Posted by underpsi68 View Post
Did you use anti seize? If not, it is a must on stainless. It will prevent it from galling.
Did not use anti-sieze. As a general rule, I don't use any type of lubricant when a torque is specified unless it's specifically called for since it can cause excessive stretch (tension). In this particular application, I used nylon type locknuts which can also cause problems if installed too quickly. That may have contributed to the problem since I used an air wrench to run the nut down then finished tightening it with a torque wrench.

The understanding where I work is that the SS bolts and what they thread into are made from the same alloy and that's a no-no. We can't use anti-sieze due to contamination issues.
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Old 04-11-2021, 07:32 AM
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Originally Posted by Smitty275 View Post
Yes, Ron's is a better bolt than stock or what is sold as stock replacement. For the nayser Ron may be the only one selling a bolt of better material. Ron's full kit is a home run deal.
Be mindful though that as some point Merc started using a 7/16 u-bolt instead of the 3/8. In which case I believe the stretching issue became a mute point.
A bit of an old thread, but how are you supposed to fit the new 7/16 u-bolt through the 3/8 holes in the gimbal ring? Drill? I find nothing after hours of searching the web!
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Old 04-11-2021, 11:32 AM
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You can not use it and don’t drill the ring to 7/16 , 3/8 u bolt is still available
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Old 04-11-2021, 12:01 PM
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Originally Posted by boatnt View Post
You can not use it and don’t drill the ring to 7/16 , 3/8 u bolt is still available
Ok, so what's the common procedure, just put a 7/16 drill bit in the cordless drill and fire away? Or are you supposed to get it machined?
I understand the latter is optimal, but if people have done it themselves and survived, then its good enough for me too
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Old 04-11-2021, 01:53 PM
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Pretty sure you read wrong the response you quoted.
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