Mercruiser 165 HP outdrive

[wesondrums]

I am totally new to boats, but I am a machanic... I just replaced my motor which is a 150 HP GM motor. When I fired it up, it runs great and after about a miniute, a noise started from what seems to be where the motor shaft goes into the outdrive. I am thinking that I need to service my outdrive. I hope It isnt to late. When put into gear, it works fine. It makes this noise that sounds like roller skates, but on a much louder scale when the motor is running. I did not know that the spline shaft needed greese.. Could that cause this? I would like to know about alignment as well.. I would appreciate any info about these issues..

 

[Don S]

Re: Mercruiser 165 HP outdrive

Did you take the outdrive off before you put the engine in? Did you make sure the alignment was OK? Did you check the gimbal bearing and ujoints?

 

[wesondrums]

Re: Mercruiser 165 HP outdrive

No, I didnt know what to check... I just thought I needed to replace the motor because of the cracked block. I dont know how to check the alignment. What kind of greese do I need for the spline shaft? How do I check the bearing? I guess I should get a manual to do it right.

 

[Don S]

Re: Mercruiser 165 HP outdrive

I guess I should get a manual to do it right.

Head up to the Adults Only sticky at the top of the forum. I think you might find a lot of information you might find interesting. Including manual downloads.

 

[wesondrums]

Re: Mercruiser 165 HP outdrive

Did you take the outdrive off before you put the engine in? Did you make sure the alignment was OK? Did you check the gimbal bearing and ujoints?

No, I was not sure what to check... I was told just to slide the old motor out and the new one in. I guess I was told wrong... I dont know how to check those things.. I guess I should have gotten a manual before starting this project.

 

[wesondrums]

Re: Mercruiser 165 HP outdrive

Head up to the Adults Only sticky at the top of the forum. I think you might find a lot of information you might find interesting. Including manual downloads.

OK.. Thank you. I will do that..

 

[wesondrums]

Re: Mercruiser 165 HP outdrive

OK.. Thank you. I will do that..

Im dont see adults only at the top?? How do I get there?

 

[ziggy]

Re: Mercruiser 165 HP outdrive

at this very minute, it's right above this thread... or
http://forums.iboats.com/showthread.php?t=288430

 

[captmello]

Re: Mercruiser 165 HP outdrive

top thread of the I/O forum.

 

[wesondrums]

Re: Mercruiser 165 HP outdrive

at this very minute, it's right above this thread... or
http://forums.iboats.com/showthread.php?t=288430

OK Thank you...

 

[Fishermark]

Re: Mercruiser 165 HP outdrive

What you have already discovered is that it is physically possible to remove and install the engine without removing the outdrive. Many boats have room to pull the engine forward and off the shaft of the outdrive. AND it is physically possible to carefully slide the shaft back in the coupler as you lower the engine back into place.

Just because it is POSSIBLE doesn't mean it is the right way. After reading the manual you will see the correct way is to remove the outdrive first, and then the engine. After reinstalling the engine it needs to be aligned, THEN the outdrive reinstalled.

Ask questions as you go along and someone will be along to help. Good luck!

 

[wesondrums]

Re: Mercruiser 165 HP outdrive

What you have already discovered is that it is physically possible to remove and install the engine without removing the outdrive. Many boats have room to pull the engine forward and off the shaft of the outdrive. AND it is physically possible to carefully slide the shaft back in the coupler as you lower the engine back into place.

Just because it is POSSIBLE doesn't mean it is the right way. After reading the manual you will see the correct way is to remove the outdrive first, and then the engine. After reinstalling the engine it needs to be aligned, THEN the outdrive reinstalled.

Ask questions as you go along and someone will be along to help. Good luck!

Do you think its quite possible the noise im getting is due to allignment? Must I remove the engine again, or can I just remove the outdrive, and align the motor, then re-install the outdrive? Also, my outdrive is a 160 mercruiser stern drive. Im not sure I am looking at the correct mannual.. Can you tell the year from the serial # 2403864 ? My Upper drive unit was bone dry... I added gear oil and serviced the bottom and all greese fittings. It still makes the noise.

 

[chiefalen]

Re: Mercruiser 165 HP outdrive

Did you change the impeller?

Did you run it without water going to the drive??

Did you run it with no gear oil in it?

You remove the drive and use a alignment bar to align the engine. Can be had on e-bay 50 bucks or less. You have to then move the motor up down sideways when you read the alignment bar.

It's all in the manual.

 

[Bondo]

Re: Mercruiser 165 HP outdrive

My Upper drive unit was bone dry... I added gear oil

Ayuh,.. That's usually a Bad thing,... Did you fill it from the Bottom,..??

Have a Look Here,.....

 

[wesondrums]

Re: Mercruiser 165 HP outdrive

Ayuh,.. That's usually a Bad thing,... Did you fill it from the Bottom,..??

Have a Look Here,.....

Yeah, I drained the lower section, and it had milkey nasty oil.. I filled it from the bottom. Then I removed the top cover to pump out the old oil, and there was none.. I hadnt ran the motor long like that, so hopefully its ok.. I added oil now. How much water should come out while running the motor? Is there a constant significant flow of water, or just when the thermostat opens? And how hot should the exhaust elbo get? I think im not getting proper water flow. Is there a pump in the bottom of the outdrive that could be my problem?

 

[Bondo]

Re: Mercruiser 165 HP outdrive

Is there a pump in the bottom of the outdrive that could be my problem?

Yes,... Click on that link,+ Look around....

 

[wesondrums]

Re: Mercruiser 165 HP outdrive

Yes,... Click on that link,+ Look around....

Thanks a lot for that link.. I have a much better understanding of how outdrives work.. I just hope nothing is dammaged. If the impellar was not working, what may I expect to be dammaged? Maybe the engine water pump? Does the outdrive need water, or just the engine? Also, should there be a good flow of water comming out of the outdrive when motor running??

 

[chiefalen]

Re: Mercruiser 165 HP outdrive

Sir; no slam against you in any way shape or form, but what makes you think you can work on a precision piece of equipment without a a manual ?

I have read this thread from beginning to end, and observed that you don't know the drive or the motor.

The manual that Don s has posted is invaluable, contains all you need to know.

So why would you not read it, understand it and then work on the drive or motor ?

This is so you don't do damage to the drive or motor. Running it without lube is a bad idea, and can lead to gear failure. And rebuilding the upper or the lower requires special tools and knowledge and is very expensive. All which
i hope you don't have to go thru.

Good luck !

 

[ziggy]

Re: Mercruiser 165 HP outdrive

what may I expect to be dammaged?

impeller, impeller housing, guide tube, waterpocket cover, riser to exhust pipe bellows, flapper, head gasket, any or all of these items, plus maybe more that i don't know about.. ya should also go find all the bits and pieces of the old impeller that are trapped inside the water system. some pieces may be found at the tstat. also, flush the small fragments out of the hose going from the ft. of the manifold to the drive. you don't want any of these pieces getting into the block as they can plug water passages inside the block which would be real bad..

Does the outdrive need water, or just the engine?

both. here's what happens to your impeller w/o water applied.. http://www.boatfix.com/merc/Bullet/87/87_14.pdf

Also, should there be a good flow of water comming out of the outdrive when motor running??

yes. water should come out in 4 places, the prop hub, the pee hole on the bottom, starboard, fore part of the bullet. and the two idle relief holes located in the transome shield on both sides. this is a pic of what i think should be normal..

kinda hard to see the idle relief water as it kinda spits out and is misty.. you can see it right in ft. of the zinc on the transom shield...

 

[wesondrums]

Re: Mercruiser 165 HP outdrive

Sir; no slam against you in any way shape or form, but what makes you think you can work on a precision piece of equipment without a a manual ?

I have read this thread from beginning to end, and observed that you don't know the drive or the motor.

The manual that Don s has posted is invaluable, contains all you need to know.

So why would you not read it, understand it and then work on the drive or motor ?

This is so you don't do damage to the drive or motor. Running it without lube is a bad idea, and can lead to gear failure. And rebuilding the upper or the lower requires special tools and knowledge and is very expensive. All which
i hope you don't have to go thru.

Good luck !

Thank you... I will read the manual.. There is more to this than I knew and was led to believe by the man I bought this rebuilt motor from.. He said "Oh, just pull the old motor out, and slide the new one in.. Youel be good to go..." The funny thing about it is, the reason he had this motor for sell, is he rebuilt this motor, ran his boat for about 10 hours, and then his outdrive went bad.. So he pulled the motor and hung on to it.. I guess he should read a manual himself, and maybe he wouldnt have lost an outdrive.. Thanks again...