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SnowTexan
Joined: 08 Aug 2019 Posts: 185 City/Region: Carlton
State or Province: WA
C-Dory Year: 2006
C-Dory Model: 22 Cruiser
Vessel Name: Miss Maria
Photos: Miss Maria
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Posted: Mon Aug 03, 2020 10:06 pm Post subject: Prop Oil seal test pressure |
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So I pulled my lower unit to swap out an impeller and decided to pull the prop and inspect the seals. The outer seal looked terrible. I am a long way from any marine mechanic and do not have the proper tool to remove the prop shaft so I did the 5th or 6th best thing: i picked the worn seal out with a screwdriver (taking care not to scratch the shaft and shred the replacement shortly after installation). The inner seal looks great, and I performed a leak test using my dingy hand pump and some gorilla tape. Yeah thats right all you professional mechanics you read that correctly 😂. I left the inner seal after seeing no air bubbles escaping with a soap and water mix. Replaced outer seal. Best I can do under the circumstances but my question is this: when a shop tests for leaks how much pressure is used? The quest for self reliance continues via reliance on cbrat wisdom.
Thanks!
Nigel |
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thataway
Joined: 02 Nov 2003 Posts: 20829 City/Region: Pensacola
State or Province: FL
C-Dory Year: 2007
C-Dory Model: 25 Cruiser
Vessel Name: thataway
Photos: Thataway
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Posted: Mon Aug 03, 2020 10:50 pm Post subject: |
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12 PSI, and should keep the pressure for 5 minutes. It is tested thru the upper port. The soapy water does a good job. You should be good to go. _________________ Bob Austin
Thataway
Thataway (Ex Seaweed) 2007 25 C Dory May 2018 to Oct. 2021
Thisaway 2006 22' CDory November 2011 to May 2018
Caracal 18 140 Suzuki 2007 to present
Thataway TomCat 255 150 Suzukis June 2006 thru August 2011
C Pelican; 1992, 22 Cruiser, 2002 thru 2006
Frequent Sea; 2003 C D 25, 2007 thru 2009
KA6PKB
Home port: Pensacola FL |
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tsturm
Joined: 01 Nov 2003 Posts: 1134 City/Region: Soldotna
State or Province: AK
C-Dory Year: 2003
C-Dory Model: 25 Cruiser
Vessel Name: JMR TOO
Photos: JMR-TOO
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Posted: Mon Aug 03, 2020 10:56 pm Post subject: |
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thataway wrote: | 12 PSI, and should keep the pressure for 5 minutes. It is tested thru the upper port. The soapy water does a good job. You should be good to go. |
What Bob said |
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SnowTexan
Joined: 08 Aug 2019 Posts: 185 City/Region: Carlton
State or Province: WA
C-Dory Year: 2006
C-Dory Model: 22 Cruiser
Vessel Name: Miss Maria
Photos: Miss Maria
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Posted: Mon Aug 03, 2020 10:56 pm Post subject: |
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Alright thanks sir! Is it normal
For the prop to be a little stiffer at first after what i’ve done? |
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T.R. Bauer
Joined: 17 Nov 2007 Posts: 1736 City/Region: Wasilla
State or Province: AK
C-Dory Year: 1993
C-Dory Model: 22 Cruiser
Vessel Name: C-Whisperer
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Posted: Tue Aug 04, 2020 12:04 pm Post subject: |
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I'd expect that since you actually have a seal now. Good Job |
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srbaum
Joined: 30 Aug 2010 Posts: 878 City/Region: Portsmouth
State or Province: VA
C-Dory Year: 2007
C-Dory Model: 26 Venture
Vessel Name: Osprey
Photos: Osprey
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Posted: Tue Aug 04, 2020 12:25 pm Post subject: |
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Something that is best practice, is to always pull the prop and related washers at each oil change period. This allows a good inspection of the propeller blades, ensures that the prop does not freeze up on the shaft, so that it can be changed in the future, allows a visual inspection of the seal and most of all, you get to ensure that there is no fishing line wrapped forward of the prop, chewing away the shaft seal.
You can true up the prop as needed with a block of wood and a ball pen hammer (minor dings) and you can use a file to clean up any burs.
When reinstalling the prop, lubricated the prop shaft and washers with a waterproof grease (synthetic Green Grease for your local auto store is great for this) place a small piece of 2x4 wood between the prop and the underside of the anti-cavitation plate. This will allow you to tighten to prop and align the nut to except the cotter pin. _________________ Steve Baum
Homeport of Portsmouth, VA
OSPREY (Ex Mister Sea) 2000 22 C-Dory 2010 - Sold 3/19
OSPREY (Ex ADITI) 2007 26 Cape Cruiser 2018 |
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SnowTexan
Joined: 08 Aug 2019 Posts: 185 City/Region: Carlton
State or Province: WA
C-Dory Year: 2006
C-Dory Model: 22 Cruiser
Vessel Name: Miss Maria
Photos: Miss Maria
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Posted: Tue Aug 04, 2020 2:36 pm Post subject: |
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T.R. Bauer wrote: | I'd expect that since you actually have a seal now. Good Job |
Hah! Yes that occurred to me shortly after posting. Thank you all for the replies. |
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