Hit some logs and possible damage to prop and/or rudder

What's on your mind? Anything generic goes here.

Re: Hit some logs and possible damage to prop and/or rudder

Postby baz on Mon Jul 15, 2019 11:26 am

My prop repair will be completed tomorrow at 10 AM. FYI... It was repaired by The Prop Shop, 3610 S Rd #100, Mukilteo, WA 98275 (425-353-5527) - https://propshopinc.com

The cost for straitening the two adjacent blades and performing a static balance will be $333. :) - about 1/10 the cost for a new prop. 8-)

I asked about applying a protective coating on the prop for inhibiting growth and lessening water friction and they said for the designed RPM range of the prop it was unnecessary; just have diver service clean the prop now and then would be sufficient.

Now to have the prop re-installed. :D
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Re: Hit some logs and possible damage to prop and/or rudder

Postby SgtAlf on Mon Jul 15, 2019 2:35 pm

Great news! :mrgreen:
Tony & Kathy
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Re: Hit some logs and possible damage to prop and/or rudder

Postby baz on Wed Jul 17, 2019 1:42 pm

The repaired prob was installed today along with a new prop zinc that will now not drop off. :D Trim tabs cleaned and bow and stern thruster zincs replaced as they were close to 50% gone.

Shared photo album here along with a photos of the stern thruster's old and new zinc.

https://www.icloud.com/sharedalbum/#B1AJOX8tMJP9V5S

Diver assured me the prop was installed the 'right way' and that throttle in fwd position WILL cause the boat to move forward. ;) 8-) :lol: Will find out for sure when I back out of my slip for a test run/spin.
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Re: Hit some logs and possible damage to prop and/or rudder

Postby ixlr8 on Wed Jul 17, 2019 1:59 pm

baz wrote:Diver assured me the prop was installed the 'right way' and that throttle in fwd position WILL cause the boat to move forward. ;) 8-) :lol: Will find out for sure when I back out of my slip for a test run/spin.

Isn't the prop/prop shaft tapered so the prop can only go on one way?
Jim
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Re: Hit some logs and possible damage to prop and/or rudder

Postby baz on Wed Jul 17, 2019 2:03 pm

Jim: Yes it is..... I was joking with the diver about this..... :roll:
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Re: Hit some logs and possible damage to prop and/or rudder

Postby Steeldieman on Wed Jul 17, 2019 3:09 pm

So how much all in did you spend? Did you get the zinc from the prop shop?
I was following a big tour boat about a hundred yards behind. I’m thinking maybe that wasn’t such a good idea, wonder if maybe something got churned up.
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Re: Hit some logs and possible damage to prop and/or rudder

Postby baz on Wed Jul 17, 2019 3:14 pm

Steeldieman wrote:So how much all in did you spend? Did you get the zinc from the prop shop?
I was following a big tour boat about a hundred yards behind. I’m thinking maybe that wasn’t such a good idea, wonder if maybe something got churned up.


The prop repair for the two adjacent bent blades plus a static balance was $333. On top of this will be what my diver service changes me for removing the prop and re-installing it. The prop zinc is not uncommon and my diver service always carries the one for my R29 CB model. They have a 'trick' to avoid the prop zinc from falling off prematurely and their 'trick' has proven to be flawless over many years servicing the RT models.
Barry & Jake-Wire Hair Fox Terrier
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Re: Hit some logs and possible damage to prop and/or rudder

Postby The Doghouse 2 on Wed Jul 17, 2019 8:41 pm

Barry, I'm glad the Prop Shop took care of you... they do really good work and they also a good place to look for a spare prop.

Your boat is "brand" new, yet that proprietary prop zinc can't be cheap and it was wasted. You've steered clear of galvanic isolators on previous boats, but your marina slip is definitely hot. Has the marina done a test recently "see" where your stray currents are coming from... I'm hoping the isolator I installed wasn't in vain!

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Re: Hit some logs and possible damage to prop and/or rudder

Postby baz on Thu Jul 18, 2019 12:10 am

Bob: The prop zinc fell prey to the retaining bolt either loosening and falling away, or the zinc material surrounding the retaining bolt's head had gone allowing the prop zinc to simply slide off.

I'm suspecting one of three things that must have happened

1) The prop zinc retaining bolt loosened and fell away allowing the prop zinc to slide off as a result.

2) The log collision somehow cause the prop retaining bolt and zinc to come off.

3) The zinc material surrounding the retaining bolt's head eroded allowing the zinc to fall away, and somehow the retaining bolt loosen and also fell away.

My diver service charges me $25 for the prop zinc and installation.

I have no faith in what my Marina tells me about their shore power testing. They tested several years ago and told me there was no issue. I also have no faith in a GFI protecting me as I tried that on my R25 Classic and it made absolutely no difference for me at Edmonds marina with the boat connected to shore power 100% of the time.

I eventually solved the issue in large part by only connecting shore power for 24 hours per week. This has resulted in my underwater zincs lasting from 9 to 12 months before they reach 50% gone. Prior to this my zincs would at 50% or less after 3 months.

Boat is kept in salt water all year round.
Barry & Jake-Wire Hair Fox Terrier
SOLD - 2010 R-25 LAXEY
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Re: Hit some logs and possible damage to prop and/or rudder

Postby BB marine on Thu Jul 18, 2019 8:15 am

baz wrote:I have no faith in what my Marina tells me about their shore power testing. They tested several years ago and told me there was no issue. I also have no faith in a GFI protecting me as I tried that on my R25 Classic and it made absolutely no difference for me at Edmonds marina with the boat connected to shore power 100% of the time.


The galvanic isolator has limitations. It works in normal conditions quite well. The fact that you have always had issues with 3 different boats and had no results from using a galvanic isolator would indicate issues around the area that your boat is located.A galvanic isolator only protects against low level DC, up to 1.2 or 1.4 Volts, so if there’s some stray current issue in your marina, which creates a voltage higher than that, the isolator won’t do anything, but this would be unusual.
It sounds like the method you are using is the best way to protect the boat. It is not convenient but if that works for you its a good solution. I personally would have the water tested and try to find the culprit. Do other boats docked in the vicinity of your boat have issues too?
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Re: Hit some logs and possible damage to prop and/or rudder

Postby baz on Thu Jul 18, 2019 11:48 am

The Doghouse 2 wrote:Barry, I'm glad the Prop Shop took care of you... they do really good work and they also a good place to look for a spare prop.

Your boat is "brand" new, yet that proprietary prop zinc can't be cheap and it was wasted. You've steered clear of galvanic isolators on previous boats, but your marina slip is definitely hot. Has the marina done a test recently "see" where your stray currents are coming from... I'm hoping the isolator I installed wasn't in vain!

Bob


Bob: I don't understand why you have a GFI as you trailer your boat and for most of the time is not in the water ????????
Barry & Jake-Wire Hair Fox Terrier
SOLD - 2010 R-25 LAXEY
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Re: Hit some logs and possible damage to prop and/or rudder

Postby The Doghouse 2 on Thu Jul 18, 2019 3:05 pm

I put new 2" pancake zincs top/bottom each trim tab prior to Poets Cove rendezvous this past spring... got home and I had more stray current patterning on the bottom zincs than I was comfortable with for the 5 days/4 nights we were moored. Although the zincs did their job, I decided a galvanic isolator might help... I want all the help I can get!
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Re: Hit some logs and possible damage to prop and/or rudder

Postby baz on Thu Jul 18, 2019 3:49 pm

Bob: how will you test the effectiveness of your GFI ?
Barry & Jake-Wire Hair Fox Terrier
SOLD - 2010 R-25 LAXEY
Trade in 2016 Ranger Gray R-21EC LAXEY
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2019 R29 CB NW Edition - IoM LAXEY, Hero Red
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Edmonds, WA
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Re: Hit some logs and possible damage to prop and/or rudder

Postby The Doghouse 2 on Thu Jul 18, 2019 8:12 pm

Probably nothing more than visual inspection of the deterioration rate of zincs.
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Re: Hit some logs and possible damage to prop and/or rudder

Postby baz on Thu Jul 18, 2019 9:35 pm

The Doghouse 2 wrote:Probably nothing more than visual inspection of the deterioration rate of zincs.


Well that is not very scientific. You need to establish a baseline and measure from that. I went from 3 months and 50% erosion to 9 to 12 months with 50% erosion using my shore power on/off method.
Barry & Jake-Wire Hair Fox Terrier
SOLD - 2010 R-25 LAXEY
Trade in 2016 Ranger Gray R-21EC LAXEY
Trade in R-27/OB, LAXEY, Hull Midnight Blue
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Edmonds, WA
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