Proper Prop Fit |
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Otto Throttle
Senior Member Joined: October-02-2017 Location: Cleveland OH Status: Offline Points: 369 |
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Posted: May-08-2018 at 6:21pm |
I just installed my acme 422 prop, I did the lapping exercise, and i put on the crown nut and tightened it. It seems as if the nut has run out of threads and i have a very small wiggle when I put my hands on it and spin it. The cotter pin is almost at the top of the crown nut to. Is there supposed to be a washer between the crown nut and the prop? I bought this used and it did not have one.
I would appreciate any help on this, as I am afraid to run it! Thanks! |
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Otto
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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I have seen where a washer is needed. There's no problem using one.
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Otto Throttle
Senior Member Joined: October-02-2017 Location: Cleveland OH Status: Offline Points: 369 |
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What size washer should I use? Stainless of course....any idea on thickness? Do you think I can find at home depot?
Thank you! |
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Otto
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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You'll need a washer for a 3/4"bolt. Careful with the OD since you don't want it larger than the hub of the prop. A SS 3/4" SAE. washer is 1.5" OD. I doubt HD will have it but a good hardware store with all the little bin boxes may. I've also used brass thrust washers. |
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Otto Throttle
Senior Member Joined: October-02-2017 Location: Cleveland OH Status: Offline Points: 369 |
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What exactly do I need size wise, and where can I get what I need please...now i am nervous that I won't be able to find anything! I am taking the nut to the store too see what I can find. I hope I didn't mess anything up :(
Thanks for your help! |
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Otto
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Go and ask for ether a SS or brass 3/4" washer. The thickness doesn't matter.
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 10646 |
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What you need is a ruler Measure your hub. Pete's already told you a 3/4 id and the OD no bigger than the hub on your prop and any thickness. You're the only one who knows how much of a gap you're dealing with. Look for a machinery bushing washer or thrust washer 3/4 by 1/1/4 will work, like he said a good hardware store will have them Here's a link to one so you know what to look for. link |
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 10646 |
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here's a SS retainer washer in the link
A lot cheaper too Stuff is out there, you just have to find it. link |
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Otto Throttle
Senior Member Joined: October-02-2017 Location: Cleveland OH Status: Offline Points: 369 |
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Thank you guys! I will be searching for these on Thursday! Wish me luck! Do you think a hardware store or West Marine? Also I would like to get a new Castle Nut. What size and thread do I need to get and can you suggest a supplier? I want to have a spare too!
Thanks again...I have only driven my boat 3 time and I just want to do everything perfect! Chris |
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Otto
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Otto Throttle
Senior Member Joined: October-02-2017 Location: Cleveland OH Status: Offline Points: 369 |
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I don't have a gap per se, it just needs a millimeter or two to be able to tighten! The thinnest I can get would be perfect!
Thanks |
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Otto
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 10646 |
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Click on the link, you'll see nyloc and castellated Both are 3/4-10 pitch, one is a lot cheaper than the other link |
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gun-driver
Grand Poobah Joined: July-18-2008 Location: Pittsburgh, Pa Status: Offline Points: 4112 |
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https://www.mcmaster.com/#contact/=1crn3tx
McMaster-Carr is close to you and will have what you need Click on contact and it has directions on how to get there |
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Otto,
Paul's suggestion for McMaster is a good but their OH. location doesn't stock as many items as their Il. warehouse. I'd check the inventory first before heading over there. Personally, I'd stop over at your local Ace first. They typically stock a selection of "oilite" bushings and thrust washers. You might have to go to their service desk and ask for them. |
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Otto Throttle
Senior Member Joined: October-02-2017 Location: Cleveland OH Status: Offline Points: 369 |
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‘Thank you everyone! Found the correct bronze thrust washer at Ace hardware for $1.49! You had to look, as it is not with the stainless washers though. I came home and the .125 was too thick to get the holes lined up, so I put a piece of 100 grit sand paper on the smooth floor and sanded it down a bit. It took about 6 or 7 try’s to get the proper fit but I did. It looks great...now I need a prop puller for the boat....I can’t pull the darn thing off! Any suggestions?
Thanks everyone! Chris |
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Otto
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Hollywood
Moderator Group Joined: February-04-2004 Location: Twin Lakes, WI Status: Offline Points: 13510 |
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You just put it on, why take are you taking it off?
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Chris,
Yes, a prop puller is needed. Sounds like you did a good job at lapping. Yes, as asked, why are you taking the prop off? |
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baitkiller
Platinum Member Joined: October-11-2011 Location: SW Florida Status: Offline Points: 1693 |
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He must have of put on backwards and now the boat goes in reverse. Rookie mistake.
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Jesus was a bare-footer.............
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Otto Throttle
Senior Member Joined: October-02-2017 Location: Cleveland OH Status: Offline Points: 369 |
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Very Funny!! As a pilot I have a back up plan for most events...now I have a spare prop (the factory) and what if I need to use it because the new one gets damaged? With out the puller i think I am up the river with no paddle! It would go in my mobile maintenance kit!
From reading there are a bunch out there...I just need one that works on my Acme wheel! Thanks guys...I will be glad when the prop issue is completed...maybe thats why I like jets! Chris |
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Otto
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gt40KS
Gold Member Joined: August-05-2017 Location: Wichita Kansas Status: Offline Points: 943 |
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Acme makes a "C" style puller for use with their props - this is what I have. But some will tell you there are other designs that work better with less stress on the prop & shaft. IDK, the Acme worked very well for me without a ton of stress on either, but everyone has an opinion. Here is a couple of styles:
C clamp style Knocker style There are others also, including some home-grown garage specials some of the forum guys cooked up. |
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JCCI
1995 Ski Nautique GT40 |
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