How to Prevent A Spun Hub On Your Prop | Bass Fishing

Hey folks, Glenn May here with BassResource. com,and I’m gonna ask you a quick question. Have you ever had a buddy come off the wateror seen someone come off the water, or maybeit’s even happened to you, that said, “Man,you know, I don’t know what happened. I was going down the lake and I just lostpower. I got a spun hub, and I have no idea why. I didn’t hit anything, never. I mean, it’s been fine. All of a sudden, it just gave. I was getting it on plane and suddenly poof!I lost power. “Well, if that’s ever happened to you let’stalk about that because there are ways toprevent that. Before I get into that though I want to talka little bit about the hub and what it does. Now, the hub, that’s the core part of yourprop. In this case, look at this, it’s right herein the core, right in the middle. See, with the hub, the prop is actually notall one unit. Right inside, if you can see, there is a littlerubber piece right in here with my fingerson right here, there’s a rubber piece on thereand there’s another, you know, metal partin there, but the prop is actually separatefrom that. And the prop is pressed on to that and seatedright to the rubber part really well, andit’s not gonna give. I mean, it’s really strong. But the reason it’s there is because if yourprop hits say a rock or something to thateffect, that prop is gonna slip. It’s gonna give. Why you want that to happen is because ifit doesn’t, then all the damage is gonna happenin your lower unit here. It’s gonna be way more expensive than justhaving to repair a prop. So it’s designed to save your engine. Now, that’s of course, under normal operatingconditions. It’s funny how the prop can actually giveway and you haven’t even hit anything. So there’s really three main ways that canhappen. So let me talk to you a little bit about thosein no particular order. Now, I know I just explained the hub in ahigh level and all you guys that are reallyinto. . . you know the gear heads that are reallyinto props don’t write me bad notes and lettersbecause I didn’t go into full detail of whatthat hub is, but in essence, that’s what itdoes. And the rubber part, that’s the key part toremember. Okay. Let’s go to reason number one why this canhappen to you. First of all, it has to do with, unfortunately,your driving and how you handle the boat. When you start from a dead stop, and a lotof us Bass anglers are guilty of this, myselfincluded, especially if you’re at a tournament,you’re at idle or you’re barely moving, andthen what do you do to get up on plane?You punch it, right?Throttle the whole way down or hammer downon that foot peddle, and the bow goes up,and you get going, and you finally get upon plane. You start trimming up and you go. When you do that, basically, it’s not gearedat all to full down, you’re putting a tremendousamount of torque on that hub, all right, tremendousamount. Now, it can withstand it. Don’t get me wrong. But you’re doing that over and over and overand over over the lifespan of a hub, it’sgoing to deteriorate. It’s gonna wear it down over time. You’ll get it worn. It can lead to, or be a cause, or part ofa cause to a spun hub. I’m not gonna say it’s the only reason youcould do it. Some people do it all their life and neverhave a problem. But it can lead to. . . and I’ll talk about someof the other reasons. When we start combining them, you increaseyour chances of this happening. But it does put too much pressure on. So what I do is I throttle about half waydown, get the boat going, get it moving, andthen just kind of gradually give it some moregas. That does two things. First of all, it’s less pressure on the hub. But also, it’s funny, you know, when you throttleand hammer down like that, that bow goes wayup. Next thing you do and you’re pushing a bunchof water in front of you, and it takes moreeffort and time to get up on plane. Well, if you do it slowly like I just toldyou, actually, what happens is you get onplane faster because the bow isn’t up so much. There’s not so much resistance and you getup on plane quicker. Let’s get on to the second reason. Again, it has to do with driving but it’salso environmental conditions. If you’re driving in, say, wind-driven waves,or a busy lake with a lot of wakes, or maybe,you know, wake borders out there, but anyway,a lot of turbulent water, and you’re goingtoo fast, you can go airborne. Especially, this happens in wind-driven waves. I’m guilty of doing this too. And what I mean by airborne is when you goairborne, you go completely out of water. So much so you hear the engine rev way up. When that happens the prop, suddenly goesway up in the stratosphere in rpms, just thisfree flowing. There’s no water resistance. It gets going really fast then it lands onthe water it goes, mhmm!It just crashed hits rally hard right in thewater. Well, that’s kind of like a soft pot strike,right?It’s a lot of work. It’s a lot of pressure, again, on that hub. What that’s gonna do over time is it’s gonnacause some damages. It’s gonna wear it. And if you combine that with what I just toldyou, that is going to eventually lead to aspun prop, okay?Driving that way is really rough on your equipment. If you find yourself going airborne like that,slow down. Trim down a little bit. Don’t get that boat out of water. It’s not a cool thing to do. It’s going to damage your equipment. I know it can’t always be avoided, those rogueways come out of nowhere and suddenly you’reairborne. If that happens and you find yourself airborne,you hear that engine rev up, the first thingyou need to do is get off that throttle asfast as you can. Now, you’re not gonna throttle all the waydown, but you hopefully are gonna preventor at least reduce the high rpms that theengine’s gonna have when you go airborne. And because you’re not on the throttle whenyou land in that water you’re not gonna haveas much torque and as much of a hit on thathub, like you would if you were still hammeringdown full power, okay?Just listen to that engine. If you get in that kind of situation, youhear that engine rev, pull off. It’s got to be a knee jerk reaction. Hopefully that’ll save some of the wear andtear on your hub. All right. So let’s get to issue number three, and thisis a little more complex. But again, it goes back to that rubber component,that rubber sleeve that’s part of the hub. Now if you look here in the back of your prop,right out of the hole, right here, this isthe front part of it, this is where the exhaustcomes out on most outboards like this. Exhaust comes out that way. Well, as you know, exhaust, it’s hot, right?And normally as well, under normal operatingconditions, with exhaust coming out, it’sfine. The rubber that’s in the hub is designed tohandle all that heat. So it’ll be fine for the lifetime of yourprop. However, if your engine’s running hotter thanit’s supposed to, now it’s a different story. Now you’ve gone to a different realm. That can be caused by three main things. There’s other reasons but the three main thingsare, first of all, well, it’s your water pump,your thermostat, or your poppet valve. We’ll go into that briefly. The water pump, you need to replace the impellerevery two years without fail. They wear out. They do. Your water pressure may look fine, guys, don’tjudge that as when you should do maintenanceby the way. But if you feel. . . every two years that impellerneeds to be replaced because it gets worn. Also, every year, even when you’re not replacingthat impeller, check the water pump anyway. Check that housing. It’s made out of. . . depends on your engine,but it could be made of sort of a hard plastic. Case in point, several years ago, during oneof those inspections, we found that my housingwas scorched. It was actually melted on the inside. And that was caused because. . . well, I talkedto my mechanic. He said down here on the intake, I may havepicked up a candy wrapper, plastic bag, couldhave picked up some leaves or something whileI was running down the lake and all it takesis a short span for it to roam without anywater, next thing you know, your housing isdamaged. Now, I never do anything. I never knew a problem at all. The water pressure looks fine, but it’s notrunning efficiently when that happens. And that means your engine’s gonna run hotterthan normal. Same thing with thermostat. Some engine’s have one, some have two. The thermostat’s not operating properly, yourengine’s gonna run hotter than normal. And also, there’s a poppet valve in there. What that’s designed to do is circulate waterinto different chambers in the engine whenyou’re running at full speed to help keepit cool. It can get clogged with sand and other particles,and not operate correctly. If any one of three of those things is wrong,your engine’s gonna be operating hotter thanit’s supposed to, which means the gases coming,the exhaust coming out around that hub arehotter than they’re supposed to. And when they’re running too hot for whatthe rubber is designed to handle, you canbegin to degrade the molecular structure ofthat rubber hub. You combine that with some of the issues Ijust told you, next thing you know, when yougo to throttle down really hard again, whenyou’re going to your next spot or when you’rejust driving down the lake, suddenly it gives,you’re gonna be one of those guys at the dockgoing, “My hub spun. I have no idea why. I didn’t even hit anything. “Don’t be that guy. Follow these tips, and your prop’s gonna lastyou probably the life span of your engine. For more tips and tricks, visit bassresource. com

Published by Randy

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