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TOPIC: 1984 Contessa exhaust boot & possible water leak

1984 Contessa exhaust boot & possible water leak 05 Jul 2017 16:18 #26

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Thanks everyone for all the help. Put new hoses, bellows, water neck etc on over the weekend. Got boat in the water and ran about 190 degrees at about 2800 rpm. how ever it felt like I was pulling a bridge. Couldn't get more than 11mph @3100 rpm which was wide open. Most of the time it starts right up , but sometimes it take a bit to get it started.
Hope every one had a safe 4TH.
Thanks,
Dale

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1984 Bayliner Contessa

1984 Contessa exhaust boot & possible water leak 05 Jul 2017 17:00 #27

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190 is still hot...keep in mind 212 =boiling water.
My 5.7 runs about 160 at 3000 rpm and maybe 170/180 at WOT..

You may have a blockage of rust scale, sand whatnot or a air breach somewhere. I'd suggest to keep trying to track what presents itself as a raw water flow issue down

I see you replaced #28 and 29. of this EVD
www.marinepartseurope.com/en/volvo-penta...44020-44-17975B.aspx

We had a failure of #11 and it created an air breach. Check the condition of it and that its still there, this comes out of the water when on plane so it doesn't present a problem until getting a move on.
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1984 Contessa exhaust boot & possible water leak 06 Jul 2017 15:42 #28

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I didn't replace 11 you are correct and the water neck connecter & gasket was pretty corroded. The guy we bought from said he had replace the raw water pump impeller but I think I'll just replace it as well. Temp runs about 120/130 about 1400rpm then at3000 Rpm it hits 190/195. I figured that's hot and being in the warm water in Florida don't help those temps. off to go over and do some more checking & wrenching.
Thanks
Dale

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1984 Bayliner Contessa

1984 Contessa exhaust boot & possible water leak 06 Jul 2017 15:44 #29

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Oh was also thinking about replacing thermostat. What's best route to go there?

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1984 Bayliner Contessa

1984 Contessa exhaust boot & possible water leak 06 Jul 2017 16:02 #30

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Not a bad idea..cheap .. easy to check.. nice to have record of when it was replaced...drop it in a pan of boiling water and see if the bugger opens...

Yes I'm in Lake Michigan so my water temps are in the 60s still/ so thats a factor for you to consider too.

Are you in a barrel or using muffs?...barrel is easiest to see if its drawing an air breach ... I actually found mine with a can of shave cream and a shop vac before doing the barrel test. I smeared the drive in the areas in question and then drew a slight vacuum on the hose feeding the water pump from the drive pick-up, and sure enough shave cream got sucked into a spot it should not have? so she got the service she should have had by the folks I got her from.

Impeller is a good idea while you're at it too, I keep a spare on-board just in case. easy to replace without even getting in the engine compartment.

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1984 Contessa exhaust boot & possible water leak 06 Jul 2017 16:19 #31

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I did do a test in a large stock cattle troughh=175 gal, after replacement of the mentioned parts. All seemed well enough for a water test. It didn't heat up in the tank, which it took getting on the water to see because it was difficult to run prop to any speed with the tank not loosing water. Tuesday we were in the water watching fireworks and had rough time restarting the motor. Got under way ran good at 10mph but it was rather warm at 180. Went to check things yesterday had hard time starting again. Sometimes starts right up then others its a bitch. have new plugs, but didn't do rotor & cap & wires yet.

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1984 Bayliner Contessa

1984 Contessa exhaust boot & possible water leak 25 Jul 2017 13:03 #32

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Morning, back after doing more work on the boat. replaced, cap, rotor, got her timed up, new 165 degree thermostat(previous owner didn't have one in it) now she purrs..Fires right up, keeps temp at about 165/170 BUT still feels like I'm towing a dock. Top speed around 10mph about 3000rpms. Could the Linkage from the shift lever not be adj correct after having the drive off?
Thanks for all the help. Slowly getting her going.
Dale

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1984 Bayliner Contessa

1984 Contessa exhaust boot & possible water leak 25 Jul 2017 13:49 #33

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Domenico wrote: ........... replaced, cap, rotor, got her timed up,
How did you adjust or set the ignition advance????

new 165 degree thermostat (previous owner didn't have one in it) now she purrs..Fires right up, keeps temp at about 165/170

BUT still feels like I'm towing a dock. Top speed around 10mph about 3000 rpm.
I'll suggest that you STOP using this boat until you get this sorted out!
At 3k rpm, and while doing only 10 mph, you are severely over-burdening this Engine.
If you continue, you will do serious damage to your Engine.



Could the Linkage from the shift lever not be adj correct ** after having the drive off?
While this may not be adjusted correctly, the Volvo Penta cone clutch is either engaged or NOT engaged.
And by the way...... ** there is rarely a need to remove an entire AQ series stern drive.


Thanks for all the help. Slowly getting her going.
Dale

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1984 Contessa exhaust boot & possible water leak 25 Jul 2017 13:59 #34

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Domenico wrote: ........... replaced, cap, rotor, got her timed up,
How did you adjust or set the ignition advance????

Using timing ligh andt it's set at 8 degrees advance. Idle about 900rpms.


BUT still feels like I'm towing a dock. Top speed around 10mph about 3000 rpm.
I'll suggest that you STOP using this boat until you get this sorted out!
At 3k rpm, and while doing only 10 mph, you are severely over-burdening this Engine.
If you continue, you will do serious damage to your Engine.

Ok, but how can I do a test with out taking her out? Any suggestions? Everything seems good while at the dock, so we do a test trip then back to do additional corrections.

Could the Linkage from the shift lever not be adj correct ** after having the drive off?
While this may not be adjusted correctly, the Volvo Penta cone clutch is either engaged or NOT engaged.
And by the way...... ** there is rarely a need to remove an entire AQ series stern drive.

I pulled the drive to but the new bellows, water neck etc which was why I thought maybe the nut spun while it was on the lift.

Thanks for all the help. Slowly getting her going.

Again thank you
Dale

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1984 Bayliner Contessa
Last Edit: by Domenico. Reason: missed a few wrords

1984 Contessa exhaust boot & possible water leak 26 Jul 2017 16:15 #35

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What prop are you spinning? That setup, running correctly will do, 25-32 WOT and cruise in the 18-25 range.

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1984 Contessa exhaust boot & possible water leak 26 Jul 2017 18:31 #36

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I'll check what prop it is later today. I bought another one that was the same as before, but I had it doing 20 mph just after purchasing the boat until the port side exhaust hose blew a large hole in it( Both hoses were dry rotted = my mistake being new to boating) Replaced them & several other parts while I had it on the trailer. Put it back in the water & this is where I'm at. It will throttle fine to 4500+ rpm easily while sitting in neutral, then when in gear she gets about 10mph @3000rpms at around half throttle. but there's no difference at full throttle except seems like its trying to go. So I slow her to about 1/4 throttle back to dock.
Thanks
Dale

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1984 Contessa exhaust boot & possible water leak 27 Jul 2017 11:58 #37

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Domenico wrote: Domenico wrote: ........... replaced, cap, rotor, got her timed up,
How did you adjust or set the ignition advance????

Using timing ligh andt it's set at 8 degrees advance. Idle about 900rpms.
Setting BASE advance is only one portion of setting/checking Ignition Advance. We should also be looking at the "Progressive" and the "Total" advance!
If the progressive and total are NOT doing what they should be doing..... all bets are OFF!
(see your OEM specs for this info)

And by the way........ 900 rpm for idle speed is too high!




BUT still feels like I'm towing a dock. Top speed around 10mph about 3000 rpm.
I'll suggest that you STOP using this boat until you get this sorted out!
At 3k rpm, and while doing only 10 mph, you are severely over-burdening this Engine.
If you continue, you will do serious damage to your Engine.

Ok, but how can I do a test with out taking her out? Any suggestions? Everything seems good while at the dock, so we do a test trip then back to do additional corrections.
This requires knowledge and experience.
The very second when you know that something is NOT right...... back off and bring it back in to the dock.


Could the Linkage from the shift lever not be adj correct ** after having the drive off?
While this may not be adjusted correctly, the Volvo Penta cone clutch is either engaged or NOT engaged.
And by the way...... ** there is rarely a need to remove an entire AQ series stern drive.

I pulled the drive to but the new bellows, water neck etc which was why
OK.... the next time that you do this, remove the transmission ONLY.
Then Re-Install the transmission last!


I thought maybe the nut spun while it was on the lift.
What nut are you speaking of?????

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1984 Contessa exhaust boot & possible water leak 31 Jul 2017 19:52 #38

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Hello, Did you diagnosis the power loss issue yet? i have a similar issue after an over heat and i think we have the same problem. i thing an exhaust flapper fell in and is restricting the exhaust. common issue i understand

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1984 Contessa exhaust boot & possible water leak 14 Aug 2017 02:30 #39

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I just discovered a water leak in my 1985 2550 today. Steady stream seems to be coming from the back just inside of the transom. I assumed it was the bellows but then I discovered the cover on the back of the 280 with the 2 screws was very loose. Could that be how the water was getting through to the inside of boat. I'm hoping that was it. It is a half hour drive to a decent landing to check it again. Sorry for the dumb question but any help would be appreciated.

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1984 Contessa exhaust boot & possible water leak 14 Aug 2017 02:35 #40

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Warba Warrior wrote: I just discovered a water leak in my 1985 2550 today. Steady stream seems to be coming from the back just inside of the transom. I assumed it was the bellows but then I discovered the cover on the back of the 280 with the 2 screws was very loose. Could that be how the water was getting through to the inside of boat. I'm hoping that was it. It is a half hour drive to a decent landing to check it again. Sorry for the dumb question but any help would be appreciated.


Would be best if you started a new thread but no that cover will not cause a leak
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Pat. Sandpoint Ida
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1984 Contessa exhaust boot & possible water leak 14 Aug 2017 12:02 #41

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Amadaies wrote:
Would be best if you started a new thread but no that cover will not cause a leak


Ditto........... Start a new thread!
(I have an idea as to your water leak)

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1984 Contessa exhaust boot & possible water leak 17 Aug 2017 13:15 #42

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Morning, No I haven't had time to get back over to the boat. Where would the flapper be located? When the trim is up a little bit you can smell & see exhaust fumes on the port side rear of the boat.
Thanks Dale

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1984 Contessa exhaust boot & possible water leak 17 Aug 2017 13:59 #43

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Domenico wrote: I didn't replace 11
SEQ# 11 is the upper pivot tube bushing.
If this bushing is worn the pivot tube will not remain centered.
If so, the water neck's special beaded gasket will quickly fail.


Where would the flapper be located?
Typically on the exhaust outlet housing.
Do you know which stern drive model do you have?


When the trim is up a little bit you can smell & see exhaust fumes on the port side rear of the boat.
Unless you have a rare 280 PT or a 290, your drive does not have power trim.

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1984 Contessa exhaust boot & possible water leak 18 Aug 2017 14:11 #44

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I have a 290 drive. The up & down switch on the dash is lit when it is other than all the way down

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1984 Contessa exhaust boot & possible water leak 18 Aug 2017 15:46 #45

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Domenico wrote: I have a 290 drive. The up & down switch on the dash is lit when it is other than all the way down


The 280 lift out unit switch will have an amber light that indicates when the drive is being lifted.
This light goes out once the drive is fully lowered.

I am not aware of a 290 using an indicator light!


.

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1984 Contessa exhaust boot & possible water leak 20 Aug 2017 00:46 #46

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his is what Bayliner sent me when I sent them the boat ID number

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1984 Contessa exhaust boot & possible water leak 20 Aug 2017 02:10 #47

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A few photos of your drive would allow me to suggest which model it is.

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1984 Contessa exhaust boot & possible water leak 20 Aug 2017 14:37 #48

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ok. Thanks, we'll be out at the boat working on it today. I stopped by another marina in town. Apparently not many around here do Volvo Penta. He told me he "thinks" I need a special tool to adj timing. I didn't have any pics with me to show him what I had for motor. I know you mentioned timing earlier & I didn't have that info to share with him either. Gonna have to start having this stuff near by..lol
Thanks again for all the help.
Dale

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1984 Contessa exhaust boot & possible water leak 20 Aug 2017 14:39 #49

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In my #7 post I have a drive pic. Do you need from another angle or additional pics?
Thanks

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1984 Contessa exhaust boot & possible water leak 20 Aug 2017 15:30 #50

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Domenico wrote: I stopped by another marina in town. Apparently not many around here do Volvo Penta. He told me he "thinks" I need a special tool to adj timing. I didn't have any pics with me to show him what I had for motor. I know you mentioned timing earlier & I didn't have that info to share with him either.
Thanks again for all the help.
Dale





OK..... this is most definitely a 280 w/o power trim.


As for adjusting ignition advance...... I am not aware of any specially required tool. By chance was that person not a mechanic?

In order to check/set ignition advance, you'll to mark off the harmonic balancer up to 35 degrees BTDC.
Next, you'll want to set BASE advance.
Then you'll want to bring the engine speed up to approx 3,500 RPM while you stroke the balancer.
Using increments of 250 rpm, make yourself a progressive curve graph per RPM and Degrees of Advance, and post the results here.

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