prop strike; think it's fixable?
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Category: General Correct Craft Discussion
Forum Name: General Discussion
Forum Discription: Anything Correct Craft
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=50806
Printed Date: March-03-2025 at 12:29pm
Topic: prop strike; think it's fixable?
Posted By: DockDoc
Subject: prop strike; think it's fixable?
Date Posted: July-31-2022 at 12:04pm
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Acme 654 prop bought from Nettle's in 2019. Brother was on the boat and hit ground at low speed ("barely out of idle").  ------------- 1993 Sport Nautique PCM 351w, no ProTec |
Replies:
Posted By: wayoutthere
Date Posted: July-31-2022 at 12:43pm
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It's fixable, but i would recommend the shaft and strut be checked as well. Nibral props are a tough hammer.
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Posted By: DockDoc
Date Posted: July-31-2022 at 12:48pm
Yeah plan is to put a new prop on and see how it feels. ------------- 1993 Sport Nautique PCM 351w, no ProTec |
wayoutthere wrote:Posted By: MrMcD
Date Posted: July-31-2022 at 2:20pm
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Ouch, that hurts. I had a nice prop damaged, took it in for repair, they charged $260 to repair it. It ran really smooth but I lost 3 MPH and RPM was higher at all speeds. I bought a new ACME to fix the MPH loss and it did but now I was out $260 + $400 for the new ACME 422. Oh well, at least I have a smooth running spare now. I would not repair it based on my experience. Prop repairs used to be $100 to $150, but I guess everything goes up now days. ------------- |
Posted By: MrMcD
Date Posted: July-31-2022 at 2:21pm
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With your prop off the shaft you can use a magnetic mount dial indicator and check run out on your shaft pretty quick and know if it is damaged or not. No reason to lap in your prop and water test. ------------- |
Posted By: DockDoc
Date Posted: July-31-2022 at 2:50pm
Great points. I’ve got a drop on a super cheap new prop on CL, really hoping that works out. I’ll look into a dial indicator as well thanks. ------------- 1993 Sport Nautique PCM 351w, no ProTec |
Posted By: DockDoc
Date Posted: July-31-2022 at 3:05pm
Actually could you comment on or point me to a post for how to use a dial indicator for this? I would need to buy one too which I’m happy to do but want to get the right one. Not sure why it needs to be magnetic. ------------- 1993 Sport Nautique PCM 351w, no ProTec |
Posted By: MrMcD
Date Posted: July-31-2022 at 3:55pm
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I used a magnetic mount for simplicity, I had one already, it mounted easy to my prop gaurd and was in a good position to place the dial indicator on my prop shaft. I recall it was hard to find a place where the taper or the prop key slot was not in the way. I am sure any mount system could work, some clamp on that would be fine also and if your trailer did not have a prop guard right under the shaft that would be more of a challenge but I think most Nautiques use a prop guard. This shows a couple of cheap dial indicators, I thought mine was a cheap one at a couple hundred dollars 25 years ago, now you can have one for $50. https://www.amazon.com/gp/slredirect/picassoRedirect.html/ref=pa_sp_atf_aps_sr_pg1_1?ie=UTF8&adId=A0509439DI8C9IDYMEGG&url=%2FMornajina-Electronic-Conversion-Indicators-Resolution%2Fdp%2FB09ZQL57JL%2Fref%3Dsr_1_1_sspa%3Fcrid%3D1FUE7TOS7NB38%26keywords%3Dmagnetic%2Bmount%2Bdial%2Bindicator%26qid%3D1659297130%26sprefix%3Dmagnetic%2Bmount%2Bdial%252Caps%252C282%26sr%3D8-1-spons%26psc%3D1&qualifier=1659297130&id=7610554209531124&widgetName=sp_atf" rel="nofollow - Mornajina Electronic Digital Dial Indicator with Magnetic Base Stand, Conversion Gage Gauge Inch/Metric 0-1 Inch/25.4 mm, Digital Probe Dial Test Indicators High Resolution: 0.01mm/0.0005'' https://www.amazon.com/gp/slredirect/picassoRedirect.html/ref=pa_sp_atf_aps_sr_pg1_1?ie=UTF8&adId=A0509439DI8C9IDYMEGG&url=%2FMornajina-Electronic-Conversion-Indicators-Resolution%2Fdp%2FB09ZQL57JL%2Fref%3Dsr_1_1_sspa%3Fcrid%3D1FUE7TOS7NB38%26keywords%3Dmagnetic%2Bmount%2Bdial%2Bindicator%26qid%3D1659297130%26sprefix%3Dmagnetic%2Bmount%2Bdial%252Caps%252C282%26sr%3D8-1-spons%26psc%3D1&qualifier=1659297130&id=7610554209531124&widgetName=sp_atf" rel="nofollow - https://www.amazon.com/All-Industrial-Tool-Supply-TR72020/dp/B002YPHT76/ref=sr_1_16?crid=1FUE7TOS7NB38&keywords=magnetic+mount+dial+indicator&qid=1659297130&sprefix=magnetic+mount+dial%2Caps%2C282&sr=8-16 ------------- |
Posted By: Jonny Quest
Date Posted: July-31-2022 at 5:14pm
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Some have had good success repairing the CNC props...others not so much. A $200 repair is half way to a new prop. Tim Benjamin ( TRBenj ) is a long-time CCF contributor and I believe he is an ACME prop dealer. I've purchased a wheel or 2 from Tim. Also, Delta Propellers has always been a good prop source. JQ ------------- Current 2003 Ski Nautique 206 Limited Previous 2001 Ski Nautique Open Bow 1994 Ski Nautique Open Bow Aqua skiing, ergo sum |
Posted By: DockDoc
Date Posted: July-31-2022 at 6:32pm
Thanks - I think I’m going to lean towards a new one ------------- 1993 Sport Nautique PCM 351w, no ProTec |
Posted By: MrMcD
Date Posted: August-01-2022 at 3:49am
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Tim also has first hand experience on how well the props work on a boat like yours so worth a quick note to see what he thinks is your best bet for a prop. ------------- |
Posted By: DockDoc
Date Posted: August-03-2022 at 4:06pm
Ah I see now! I'll most likely be looking at this on a service rack rather than on the trailer... I already got the magnetic mount one, but I'll make it work, maybe I can clamp a piece of steel onto the rudder or something. ------------- 1993 Sport Nautique PCM 351w, no ProTec |
Posted By: DockDoc
Date Posted: August-03-2022 at 4:09pm
Thanks - actually I have a new prop on the way that I found relatively cheap online! Question - is there a procedure for checking the straightness of the shaft with the dial indicator? Do I just put it up to the shaft and rotate it (how?) and watch how much variation there is? Less that 0.003 is acceptable? ------------- 1993 Sport Nautique PCM 351w, no ProTec |
Posted By: MrMcD
Date Posted: August-03-2022 at 10:24pm
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You want to be as close to the threads on the prop as possible but need to check on the smooth surface and avoid the key way. I have seen some clamp mount dial indicator bases that have a stiff but flexible attachement. One of those might make the job easy for you. I do not recall exactly where I ended up measuring mine but I had a significant bend so mine was obvious. ------------- |
Posted By: DockDoc
Date Posted: August-03-2022 at 10:26pm
Ok thanks - btw I was able to secure a brand new 654 prop on Facebook marketplace for a very reasonable price! ------------- 1993 Sport Nautique PCM 351w, no ProTec |
Posted By: DockDoc
Date Posted: August-04-2022 at 9:25pm
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Happy to report I found a new 654 prop on Facebook marketplace. Installed it today. Ran the shaft on the dial gauge and found it only varied by *maybe* 0.002, and probably more importantly, the boat runs like a top with no vibration using the new prop. Think I got lucky on this one! ------------- 1993 Sport Nautique PCM 351w, no ProTec |
Posted By: Jonny Quest
Date Posted: August-04-2022 at 9:55pm
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Nice. I run a 654 on my Bubble-But Ski. At 4,400 feet of elevation, the pitch is just about perfect. JQ ------------- Current 2003 Ski Nautique 206 Limited Previous 2001 Ski Nautique Open Bow 1994 Ski Nautique Open Bow Aqua skiing, ergo sum |
Posted By: DockDoc
Date Posted: August-04-2022 at 10:07pm
Not sure if this is an issue with my boat or the prop, but I’m incapable of a no wake speed. Barely in gear it puts out enough wake that I’ve been yelled at on numerous occasions. Of course I can always blip in and out of gear. I’ve got the idle set to as low as it’ll go without stalling. Have that problem? ------------- 1993 Sport Nautique PCM 351w, no ProTec |
Posted By: Jonny Quest
Date Posted: August-04-2022 at 11:55pm
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That sounds a bit odd... My old 1994 Ski also had a 654 on it. At idle (700 rpms) it made "no wake" speed just fine. I'm not a big fan of in-and-out-of-gear at wakeless. Pay no attention to the "haters". The inboard configuration needs a certain amount of forward speed to maintain proper steerage. I would, however, pay attention to the opinion of the Fish Cops... JQ ------------- Current 2003 Ski Nautique 206 Limited Previous 2001 Ski Nautique Open Bow 1994 Ski Nautique Open Bow Aqua skiing, ergo sum |
Posted By: MrMcD
Date Posted: August-05-2022 at 3:01am
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In our 1995 GT40 with a 422 Acme at a flat idle it still has a wake and near marina's I have been yelled at several times. I just try and swing wider so I am on the far side from the tied up boats and when they yell I am farther away and ignore them. I think some of those guys just sit on their docks waiting for someone to yell at after several beers. I do stay at idle, not like some that you hear rev up to 1,000 or more RPM to get out of the no wake zone faster. ------------- |