5.0GI PEFS, SX-M - Noise / Questions

[dmichaud2]

Hi all and thank you in advance for some help.

I have a boat that is new to me this year, its a 2001 Four Winns 180 with the 5.0GI PEFS engine and a 1.66 SX-M outdrive. The engine is black so its the OMC/Volvo version. My previous boats were Merc drives so this is my first time with a Volvo Penta.

Engine Serial: 4012030052
Outdrive Serial: 4202014961

I noticed 2 things that have me wanting to do some work.

1. Exhaust seems to be coming up along the transom, which based on my understanding means exhaust bellows leak as the exhaust should be coming out through the prop.

2. A newly developed shudder that can not be felt much when drive is straight but gets quite strong the harder you turn the boat, if the right harmonic is found it shakes the boat quite well

My assumption so far is this, in 10 years the bellows may never have been replaced (I don't know much about the history of the boat) and they may be leaking. I am guessing the U-Joints are going bad and possibly the gimbal bearing as well. I plan to pull the drive off to replace anything that is needed as well as do the usual proper maintenance when pulling the drive.


Any thoughts on the issues and/or warnings on things to know before I tear into this beast would be greatly appreciated.



Danny

 

[Don S]

Re: 5.0GI PEFS, SX-M - Noise / Questions

1. Exhaust seems to be coming up along the transom, which based on my understanding means exhaust bellows leak as the exhaust should be coming out through the prop.

Your understanding is a little off. There are two approx. 1" dia. idle relief ports cast into the transom shield. Water will travel the path of least resistance.
If the bellows has a rip in it, replace it.

2. A newly developed shudder that can not be felt much when drive is straight but gets quite strong the harder you turn the boat, if the right harmonic is found it shakes the boat quite well

Pull the drive (Should be done yearly anyway) check your gimbal bearing, ujoints, and alignment. AND GREASE the splines to the coupler................... Yearly.

My assumption so far is this, in 10 years the bellows may never have been replaced

Replace it without question. If the bellows gets water in it, the price of repair will increase 10 to 20 times the cost of a bellows.

Here are links to the OEM Service Manuals for your engine.
http://www.4shared.com/dir/14518190/c08a758e/EFsharing.html

 

[2001 Stingray]

Re: 5.0GI PEFS, SX-M - Noise / Questions

Don, may I respectfully interject.

That's the model engine and drive on mine, there is no exhaust bellows.
Volvo equipped them with an open exhaust tube, which only seals, and goes through the prop when the drive is completely down.
When partially raised, the exhaust does not go through the prop.


The shake when you're turning:

First check the engine alignment.
If alignment was bad, but shaking continues, then the u-joints, or coupler have been affected. Maybe the gimbal bearing too should be checked.

 

[bruceb58]

Re: 5.0GI PEFS, SX-M - Noise / Questions

Volvo does not come with exhaust tubes as Don has pointed out to me before. If you have a tube on there, someone else put it on.

 

[2001 Stingray]

Re: 5.0GI PEFS, SX-M - Noise / Questions

Volvo does not come with exhaust tubes as Don has pointed out to me before. If you have a tube on there, someone else put it on.

Reference:

Volvo Penta Factory outdrive manual P/N 3850075 1999 "WT" Models
Page 3-14
Diagram 4
Circled C
Shows an exhaust tube.

So does the manual Don referred to. Page 80.

I questioned the owner of Stingray Power Boats about this 10 years ago.
They only want the exhaust gases through the prop on initial takeoff, not cruise.
This was meant to allow a 23" factory installed prop to slip.

 

[dmichaud2]

Re: 5.0GI PEFS, SX-M - Noise / Questions

I have been pouring through the manuals and I am not understanding the issue of alignment. Is this an issue of transom shield position vs. engine position? As in if say the transom shield for some reason shifted a bit lower on the transom causing a strain on the shaft between the engine and outdrive (or if a motor mount sagged causing the engine to be lower then it used to be) ?

 

[dmichaud2]

Re: 5.0GI PEFS, SX-M - Noise / Questions

Also, I cant seem to track down a part number for the gimbal bearing for this drive, the catalog on volvopentastore.com seems to list every part I can think of except a gimbal bearing. Am I missing something obvious?

 

[2001 Stingray]

Re: 5.0GI PEFS, SX-M - Noise / Questions

Also, I cant seem to track down a part number for the gimbal bearing for this drive, the catalog on volvopentastore.com seems to list every part I can think of except a gimbal bearing. Am I missing something obvious?

Volvo # 3853807-0

 

[2001 Stingray]

Re: 5.0GI PEFS, SX-M - Noise / Questions

Yes, the front mounts of the engine determine alignment.

The shaft from the outdrive must be perfectly aligned throught the gimbal bearing into the coupler.

 

[bruceb58]

Re: 5.0GI PEFS, SX-M - Noise / Questions

So does the manual Don referred to. Page 80.

That picture is just the housing that the exhaust bellows attaches to.

I would love to know what the Volvo part number is for a tube!

Thinking one was available, I tried a few years ago to locate one and I came up empty.

EDIT:
Hmmm...I think I found it:
http://www.dougrussell.com/partscat...,3321,3322,3323,3324,3325,3326,3327,3328,3329
On a SX-MHP model whatever that is.

 

[Don S]

Re: 5.0GI PEFS, SX-M - Noise / Questions

That's the model engine and drive on mine, there is no exhaust bellows.
Volvo equipped them with an open exhaust tube, which only seals, and goes through the prop when the drive is completely down.

He said he has an SX-M, if you look at the information you are giving, it's from the SX-MHP section of the manual, not the SX-M section. HP= High Performance

I questioned the owner of Stingray Power Boats about this 10 years ago.
They only want the exhaust gases through the prop on initial takeoff, not cruise.

Thats great, except for the fact, but when did they become the spokes people for Volvo.

 

[Don S]

Re: 5.0GI PEFS, SX-M - Noise / Questions

I have been pouring through the manuals and I am not understanding the issue of alignment. Is this an issue of transom shield position vs. engine position? As in if say the transom shield for some reason shifted a bit lower on the transom causing a strain on the shaft between the engine and outdrive (or if a motor mount sagged causing the engine to be lower then it used to be) ?

Here is a thread on alignment. It's Mercruiser, but the processes. tools and reasons for alignment are exactly the same.
Being out of alignment will destroy the coupler in short order.
http://forums.iboats.com/showthread.php?p=2971085

 

[2001 Stingray]

Re: 5.0GI PEFS, SX-M - Noise / Questions

He said he has an SX-M, if you look at the information you are giving, it's from the SX-MHP section of the manual, not the SX-M section. HP= High Performance



Thats great, except for the fact, but when did they become the spokes people for Volvo.

Thats Bruceb58s manual, I have the factory SX manual.
I noticed a tube on mine when I did my first engine alignment.

Spokesperson, I dont know, but it was nice being able to speak with the owner of the company that built your boat.
I do know that they do a lot of R&D on their lake in Hartsvillle, and very very knowledgeable. The proof to me was having a 20 ft boat
with a 5.0 do 64MPH GPS!!!

 

[Don S]

Re: 5.0GI PEFS, SX-M - Noise / Questions

Let's not hijack this thread with your information. The manual you stated was canceled by volvo for a lot of wrong information.
The original poster does not have a tube (he called it a bellows), or a Stingray or the MHP (High Performance) transom shield.

 

[bruceb58]

Re: 5.0GI PEFS, SX-M - Noise / Questions

Wasn't my manual. I found it on a parts diagram for the MHP model.

 

[2001 Stingray]

Re: 5.0GI PEFS, SX-M - Noise / Questions

Let's not hijack this thread with your information. The manual you stated was canceled by volvo for a lot of wrong information.
The original poster does not have a tube (he called it a bellows), or a Stingray or the MHP (High Performance) transom shield.

The reason I responded, is that I have the exact engine drive combo. Not a SX-MHP, just a SX-M.
Sorry about the semantics, but the OP does not yet know whether he has a bellow, or a tube.

I tend to rant at my old age!!!

 

[bruceb58]

Re: 5.0GI PEFS, SX-M - Noise / Questions

Bottom line...the exhaust exits through the relief holes at the bottom of the transom shield when idling. He also said in his original post that he has bellows.

 

[dmichaud2]

Re: 5.0GI PEFS, SX-M - Noise / Questions

Thanks for all the info everyone, I am going to tear into it this weekend I will report back what I find.

The exhaust is a bellows and not a tube, but I am glad to hear that the exhaust bubbling up the transom is normal. I am having an issue with a lot of spray on the back of the boat getting the sundeck wet when running. I had thought that was exhaust issues at first now I suspect it may just be an aspect of the boat design (2001 Four Winns 180 Horizon).



-Danny