When to replace the prop...

xlr8n4fun

Recruit
Joined
May 15, 2004
Messages
3
I am a very new boat owner. (3 whole days) ... <br />I have a new boat owner question. <br />I was out yesterday & went from 20 feet to 5 in a matter of 2 seconds and my poor prop really pulled through.<br />It made it back to the marina, and I took a peek at the damage. It bent a sliver about 1/8 inch thick, out of one of the fins of the prop (I don't know the technical term for that). It's bent back a bit... It doesn't look too too bad. <br />I have a spare prop for it.<br /><br />My question is ... when do you replace the prop. Is a nick ok or a slight gash in one of the things... (some one please clue me in on what you call those) bad, will it make a difference in the performance of the boat? <br /><br />Thanks for your help.
 

bomar76

Lieutenant Commander
Joined
Jun 27, 2002
Messages
1,963
Re: When to replace the prop...

Yes any damage at all will affect performance. <br />Put your spare on and take the damaged prop to a prop shop and have it fixed.<br />It you have knocked it out of balance at all it could destroy the lower unit.
 

Solittle

Fleet Admiral
Joined
Apr 28, 2002
Messages
7,518
Re: When to replace the prop...

If the bend is gentile you might be able to bend it back if only out by a little bit - can't tell by your description of "It bent a sliver about 1/8 inch thick". If you try it use a pliable but firm backing. I have used a block of wood and sand. Then use this prop as a spare.<br /><br />In any case you don't have to replace it. Propeller shops recondition these all the time.
 

Northern Eclipse

Senior Chief Petty Officer
Joined
Jun 24, 2003
Messages
665
Re: When to replace the prop...

Replace it when it begins to look like a mushroom, just foolin with ya, Technally props should not have any dings or bends, they can be placed out of balance when a strike occurs thus transmitting vibrations throughout the drive train which could cause damage to seals and bearings in the outdrive in due time, put your spare on, Don't forget to lock down the Tab washer on the prop nut/retainer and have your prop repaired, most repairs can be made at about 1/2 to 1/3 the cost of a new one and obtain charts of the area you boat in, or find somebody that knows the lake to help guide you as to where you can go and not go, hitting the bottom can be costly and dangerous, If your in waters your not sure about slow her down and watch your depths carefully, even with a depth finder at planing speeds when the bottom comes up its going to be to late, since your new to boating you will encounter the learning curve, as to docking and loading and unloading boat on and off trailer, If you have not already maybe consider taking a boat safety and handling course, I see from your post your a new boat owner, are you also a new operator, please don't get me wrong I'm not bashing you, just trying to give helpful advise so you and family and friends can enjoy boating to the max, but there is a reason why you touched bottom. I boat in some of the most dangerous fresh water's in North America as far as under water hazards go. I'v never damaged a prop or skeg due hitting the bottom, now picnic tables and deadheads have been another issue, anybody on this board that has ever boated in Southern Georgian Bay will most agree with me, Glad you came to the board for advise people here will help you out we're not here to knock ya down sorry for the ranting but I see way to many new owners getting into trouble and then getting fed up with boating altogether.
 

xlr8n4fun

Recruit
Joined
May 15, 2004
Messages
3
Re: When to replace the prop...

Thanks for all the great tips. I appreciate them all. <br />I am going to replace the prop... however, have no idea how to do that, so I will take it to the marine shop here locally & ask them to show me. I can then have the prop that is going to get repaired somewere to have it re-furbished. <br /><br />I am taking an online boaters course for the certification for my state to better understand the laws & rules of boating... I also have checked out every book in the library that has boat in the title or subject. In 2 years when I resurface from the stacks I should know what I am doing. <br /><br />Just a funny note. My husband was so intimidated about hitting the dock he killed it about 50 feet out & we had to coast ... which was assisted with an oar. Then, paddled it up on the trailer. There was another guy on the dock who just looked at us like the idiots we were and said "new boat" ... and I think I managed a "yep" ... though he probably thought I was crazy I was laughing so hard.
 

quantumleap

Master Chief Petty Officer
Joined
Feb 16, 2004
Messages
813
Re: When to replace the prop...

Changing the prop is about the easiest maintenance you can do. Bend up the three locking tabs on the silver washer right under the nut. (three are used and will be pushed into the recesses of the prop hub three will not be lined up and are un-used). Loosen and remove the nut and the prop will slide right off. Take note or the orientaion of the nut, washer, prop hub sleeve and thrust washer(bronze washer under prop). Grease shaft splines before installing new prop and re-install and tighten(make sure nut is seated in lock washer, not crooked on top of washer)to align tabs on lockwasher and depress three corresponding tabs into recessed on prop hub. (I assumed the mercruiser is the new one!) The End. :cool:
 

Northern Eclipse

Senior Chief Petty Officer
Joined
Jun 24, 2003
Messages
665
Re: When to replace the prop...

Xl8n4fun with all that research and courses you'll have the skills of any old salt here the board in no time, Heres a few tips to help you around the docking task. <br /> 1) Don't be in a rush, stop a few yard from dock out of the way on any boats, deploy your fender (bumpers) and prepare your dock lines, and move any items on the floor that may cause a fall such has a cooler. <br /> 2) Take note of wind direction and current, then approch dock slowly, remember the prop needs to be turning for affective steering, approck dock with bow at about a 45* angel to the dock, when getting close to dock say 5 feet or so ( this may vary) start turning boat to bow will move perpendicular to dock and stern move towards dock, at the same time shift to nutreul and at the same time turn steering full over towards dock and shift into reverse to set boat and quickly back to nutreul. <br /><br /> note these are just tips and practice is what will make you a master, just be prepared, slow and easy if you don't land it the first time back off and make another attempt. we always look better when we do it right the second of third attempt than screw up on the first.
 

cuzner

Senior Chief Petty Officer
Joined
Feb 14, 2004
Messages
771
Re: When to replace the prop...

Until you feel comfartable docking do what it takes and don't hurry. But don't turn off your engine!!!!!!!!.Just leave it in neutral Till your resdy to pull it from the water.I've helped countless people putting boat in or taking boat out.Don't worry about people looking while doing this. We all had to start doing it sometime and a kind word of advice or offer of assistance goes a long way to new boaters.I've even seen experienced boaters ***** at people for tying up the ramp for too long instead of helping.Take your time putting in and out,and get out of the way as soon as you can.I'd hate to see some get turned off boatingbecause of stupid crap like this.<br /><br /> Jim
 
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