alpha one gen 2 vibration clunking

Rick Stephens

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09TNRT is right that your outdrive behavior is a problem in ujoints and/or gimbal bearing. Acts like it, sounds like it.
 

heath454

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i agree that its ujoint shaft related. thus being the reason i put new ujoints in it. i have had the out drive off 1000 times i have put gimbal bearing in it. i have pulled it out and inspected and reinstalled it i have use alignment tool and checked it over and over and over.. i can not find it.. i just cant see the issue..what is wierd is if you set in the boat. doing what i was doing in the video. if you are at center with lower unit you can feel the roughness in it. as you start to turn the lower unit into a right turn it gets smoother. all the way over to the stop ..then as you start to make a left turn it slow and constantly gets rougher and rougher all the way over till you hear the ujoint chatter...i got my hands on another drive shaft and ujoint assy. i think im going to change the whole shaft assy just to see. my only concern is that i think its out of a alpha one gen one. so im not sure it will interchange.. i think the main difference is the extra spot for the oring to seal the splines in the coupler i will compare length and spline and diameter etc. before i try this.. the only other thing that has me wondering is the gimball bearing..... the book i have said to install bearing with the notches facing foward. so i installed it with notches towards the engine. i was looking at a guys boat the other day and his bearing is installed with notches facing towards the rear of the boat...does this make a difference?? is mine backwards causing this issue..??
 

heath454

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Im going to swap tne shafts today. We will see if that makes any difference
 

Scott06

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Look for rubbing on the driveshaft parts and ujoints, also ensure the gimbal bearing us fully seated. Something up there is hitting.
 

heath454

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I been messing with it all day. The other shaft assy that i was able to get ..well. it siezed up and i had to cut housing apart to remove it.not sure i want to put it in mine...... what has me stumped is why is it only when you trim up or turn right....if shaft or ujoints assy. Was tweaked in any way woulnt it do it turned any direction...a shaft turns 360 degrees....so. in theory bent would be bent throwing shaft off in all degrees of rotation.not jist up and right.correct????
 

heath454

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Ok. So. I turned gimbal around. Put other shaft assembly in it and it does the exact same thing maybe worse now..it's got to be alignment..there must be something out of alignment.thats all it could be..idk if gimbal isn't going in straight,center of coupler is cocked,or motor is not straight..doesn't make sence
 

Rick Stephens

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If your alignment tool goes in easily and shows concentric marks, then next step is turn the motor in 90 degree increments and check alignment at each stop. That will tell you if the coupler is out of round.
 

heath454

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Ok rick. Im gona try that this evening ...i have started this thing with the out drive out and watched the splines turn...they seem to turn as perfect as possible with no look of being cocked or tweaked..BUT i wonder if a person would be able to notice..looking through the back with a light... i have spoke to couple boat mechanics in my area. No reall help..one even said he has herd several boats with ujoint chatter in a rurn or trimed up..i dont think this is normal
 

Rick Stephens

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When you first stick the alignment tool in, take a 2 pound hammer, I use a dead blow with a plastic face, and whack the alignment bar left, right, up and down. Good hard smack. This will align the gimbal bearing with the bar.
 

heath454

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Put a sierra gimbal in it .the bearing i had was really cheap the inside would wobble aeound very easy. The sierra was not like that at all...but it didnt fix the problem...so i pulled it out again...startes checking alignment..first time. It went in perfect even spline markes.turned it 90. Still went in ok but grease markes changes..turned it 90 and couldnt hardly push it in..and had to use two hands to drag it back out...turned it another 90 it losend up again but grease marks were way off..like. showing on one side and norhing on the other.. im thinking coupler now????
 

Rick Stephens

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Put a sierra gimbal in it .the bearing i had was really cheap the inside would wobble aeound very easy. The sierra was not like that at all...but it didnt fix the problem...so i pulled it out again...startes checking alignment..first time. It went in perfect even spline markes.turned it 90. Still went in ok but grease markes changes..turned it 90 and couldnt hardly push it in..and had to use two hands to drag it back out...turned it another 90 it losend up again but grease marks were way off..like. showing on one side and norhing on the other.. im thinking coupler now????

Sounds like coupler. Could certainly be the cause of noise. you would think it would have failed a long time ago if it was out of round.....
 

heath454

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Thats what i was thinking but im so stumped on this thing...how could that thing slip out of round but pull a tube for the past month and never slip one single time
 

heath454

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i have orderd a coupler. it will take me a day or so to get it here. only took me hour and a half to pull motor the last time. so hopefully i can have it going bye the weekend.
 

heath454

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having issues with the alignment.. this thing is shifted off to the right . i can not get it centered with the bearing. if a loosen all the mounting bolts and hang it with the hoist. i can get it aligned perfect. then when i get the rear mount bolts tight it shifts the alignment off to the right. every time..
 

Baylinerchuck

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having issues with the alignment.. this thing is shifted off to the right . i can not get it centered with the bearing. if a loosen all the mounting bolts and hang it with the hoist. i can get it aligned perfect. then when i get the rear mount bolts tight it shifts the alignment off to the right. every time..

Maybe a dumb question, but are you assembling the rear mounting hardware as pictured in the attachment?
 

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heath454

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yes sir that is how i have the hardware installed. BUt i just determined that my brand new coupler is a 1/2 inch out of round in the center.. i had the alignment perfect .. although i didnt have the mounts bolted in. but i was experimenting with a few things. then i decided while it was perfect i would go ahead and turn engine in 90 degree incriments... HOLY cow i could see the coupler wobling out of center with the bearing just turning it over with a ratchet.. what the hell i swear this whole deal is cursed!!!!!!!! pulled motor back out. removed bell housing. hooked batter up to starter. crancked it over and sure enuf.. center of coupler is way out of wach... how could this be i just took it out of the box
 
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