Odd sound lower end

roger2015

Member
Jun 11, 2015
92
florida
Boat Info
1988 sorento s-21
Engines
350
Just did a shift shaft seal and Impellor change, finally got time to put on muffs before heading out tomorrow, not gonna happen
have a grunt type sound when I am engagedthe in forward gear with a little throttle and a tinging sound when trying to put it into forward gear
OH WHAT DID I DO WRONG???? Any thoughts from you experts,
im pulling lower unit tonight to try and figure it out
thanks in advanced
 
Everything looks right, no burs or any kind of shavings around lower drive shaftorvthe shift shaft
i don't think it made that sound prior to the work I did, although this is the first time I have had it on muffs, could the sound be muffled when it's in the water?
Seemed to shift differently from F to R as well, there has alway been a slight grind from F to R
Just don't know.....
 
Put it back together, made sure all is right as I did prior, gonna get some shut eye and hook up the muffs in the morning and see.....:thumbsup:
 
Put it back together don't hear the grunt sound but it does still have the tinging sound prior to engaging into gear
 
They do sound different out of the water. Is your lower unit full of oil?


Sent from my iPhone using Tapatalk
 
Try this (with engine off):

-- In neutral, spin the prop by hand and note if there if you hear or feel anything
-- Put the drive in FWD and spin the prop. In one direction, you won't be able to - in the other you will hear and feel loud clicking. Take note to how loud it sounds and how heavy it feels.
-- Do the same thing as above, but with the drive in REV. Take note if the clicking sounds/feels different than when in FWD.

Post back what you find, and if you can post a picture of the starboard manifold area (where the two shift cables are), that could be helpful, depending on what you find above.
 
Try this (with engine off):

-- In neutral, spin the prop by hand and note if there if you hear or feel anything
-- Put the drive in FWD and spin the prop. In one direction, you won't be able to - in the other you will hear and feel loud clicking. Take note to how loud it sounds and how heavy it feels.
-- Do the same thing as above, but with the drive in REV. Take note if the clicking sounds/feels different than when in FWD.

Post back what you find, and if you can post a picture of the starboard manifold area (where the two shift cables are), that could be helpful, depending on what you find above.
LOL WITH ENGINE OFF
did as you suggested, in reverse it was a little tougher, with a little heavier sound than in forward gear, no noise in neutral
i have a video of it but not sure how to post it
 
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Yes unit is full of gear oil, filled it from the bottom like you should till it came out the top vent hole
 
Try this
[video=youtube_share;0SGu2NV-LTY]http://youtu.be/0SGu2NV-LTY[/video]Try this (with engine off):

-- In neutral, spin the prop by hand and note if there if you hear or feel anything
-- Put the drive in FWD and spin the prop. In one direction, you won't be able to - in the other you will hear and feel loud clicking. Take note to how loud it sounds and how heavy it feels.
-- Do the same thing as above, but with the drive in REV. Take note if the clicking sounds/feels different than when in FWD.

Post back what you find, and if you can post a picture of the starboard manifold area (where the two shift cables are), that could be helpful, depending on what you find above.
 
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OK, that was good. Meaning, you "might" get away with a $0 fix. If you had a picture of the manifold, it might be easier to walk you through the next step, but let's give it a try. So, what's going on there is that your shift cable has stretched a little. Eventually, it will need to be replaced, but we can buy some time by adjusting the brass, barrel nut adjuster on the shift cable (starboard manifold). What we're after here is to make that noise/feel you experienced exactly the same in both FWD and REV. Take note to where the barrel nut is right now (count the visible threads in one direction). Adjust the barrel nut a few turns in one direction and try the experiment again. Continue until that clicking is the same in both directions. Now, I know you're going to ask "Which way should I turn it"... Well, I always forget until I start doing it! The good news is that you have a 50/50 shot of getting it right on the first try - and if you don't, you just double back the other way. The reason for originally taking note of where the nut is to start with is so that if you get completely goofed up, you can always get it back to where it is right now.
 
OK, that was good. Meaning, you "might" get away with a $0 fix. If you had a picture of the manifold, it might be easier to walk you through the next step, but let's give it a try. So, what's going on there is that your shift cable has stretched a little. Eventually, it will need to be replaced, but we can buy some time by adjusting the brass, barrel nut adjuster on the shift cable (starboard manifold). What we're after here is to make that noise/feel you experienced exactly the same in both FWD and REV. Take note to where the barrel nut is right now (count the visible threads in one direction). Adjust the barrel nut a few turns in one direction and try the experiment again. Continue until that clicking is the same in both directions. Now, I know you're going to ask "Which way should I turn it"... Well, I always forget until I start doing it! The good news is that you have a 50/50 shot of getting it right on the first try - and if you don't, you just double back the other way. The reason for originally taking note of where the nut is to start with is so that if you get completely goofed up, you can always get it back to where it is right now.

I forgot about that pic, I'll have to subscribe to upload it which I don't mind, very little expense for all the great knowledge in here
the shift cable is new, it must have not been adjusted quite right
 
I forgot about that pic, I'll have to subscribe to upload it which I don't mind, very little expense for all the great knowledge in here
the shift cable is new, it must have not been adjusted quite right

They sometimes stretch out after being used a little. Not uncommon.
 
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    Hope this works
 

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On yours, the adjuster is painted black - but it's the piece right in the middle of the picture.
 
Wel miners successful on that issue but now it seems I have starter issue
grind when trying to start when I wanted to make sure adjustment was correct when shifting while running
 
The two issues are completely unrelated, so I can't imagine that you did anything during the shift adjusting to affect the starter. It could be that, for whatever reason, the starter picked this time to become 'misaligned' with the flywheel. But, are you sure the starter is actually grinding? Sometimes a low battery can cause the starter to make a funny noise. Does the engine physically look like it's turning over at the proper speed?
 
The two issues are completely unrelated, so I can't imagine that you did anything during the shift adjusting to affect the starter. It could be that, for whatever reason, the starter picked this time to become 'misaligned' with the flywheel. But, are you sure the starter is actually grinding? Sometimes a low battery can cause the starter to make a funny noise. Does the engine physically look like it's turning over at the proper speed?
I don't think it's engaging enough to turn it over and I definately don't want to grind the flywheel, while i was fixing other issues I also washed down engine compartment and I'm thinking I got the starter wet, I'm thinking maybe bendix is bad from getting wet and not fully engaging
 
That's a good thought and it very well could be that. Spray it down with WD40 a few times and double check the battery condition (and also all of the cable connections - remove, clean, reinstall) before you do the contortion-thing to remove the starter.
 
That's a good thought and it very well could be that. Spray it down with WD40 a few times and double check the battery condition (and also all of the cable connections - remove, clean, reinstall) before you do the contortion-thing to remove the starter.
Yes thank you
definately want to exhaust all options before tearing into it head first, hope for the best expect the worst, glad they put some thought into the aft of this boat on designing the engine compartment, my whole lounger is removable42020[/ATTACH]
 

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And, you might even find that the big wooden, carpeted piece (that the black, nylon strap is attached to) is removable with just a few screws and maybe some aluminum angle brackets.
 

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