Mercruiser 3.0 No Spark issues

[nola mike]

With the lower shift cable disconnected I can shift the drive by turning the shift boot with my fingers yes

Turning the shift boot? I'm saying take the cable off and move it in and out by hand

The water was leaking through the trim hose area while the motor was off. It's possible I disturbed the gasket for the trim manifold while doing all this work? If that is likely I can reach the trim manifold gasket

Water coming into the boat or going out?

After fiddling with the shift cable and redoing my adjustment again it appears that issue is resolved. I can get FWD, neutral, reverse all out of the water. Prop locking how it should.

However, the shift interrupt switch is not being actuated how it should.

Again, disconnect cable and try shifting manually. Should be K-Y smooth. That will tell us if it's the cable/drive or an adjustment problem.

To me it seems that in reverse the shift interrupt is always active, and when shifting to forwards it does not move at all.

It shouldn't move at all with the boat out of the water. If it's moving like you describe, that suggests a cable problem.

 

[aidanmurphy]

Thanks Mike, I misunderstood what you meant by disconnect the cable and try, I thought you meant to actuate the shift boot manually on the drive.

Water into the bilge where the trim hoses come through the transom. A significant steady stream.

With the cable disconnected moving it in/out by hand, it is extremely smooth and no binding. The shift interrupt switch is in the "kill" position with the throttle in reverse. Seems like I have just adjusted the cables incorrectly. Will dig into this more. My main concern at the moment is the leak

 

[dubs283]

Water into the bilge where the trim hoses come through the transom. A significant steady stream.

If coming from the bottom of the gimbal housing it could be the gasket for the trim hose manifold block mounted to the bottom of the housing (exterior side), transom seal gasket, or lower through bolt/anode assy (if equipped). If dripping from above could be y-pipe seal, bellows, etc....

 

[alldodge]

The ports are shown in this link
https://www.thehulltruth.com/boating-forum/601303-water-coming-weird-place-mercruiser-i-o.html

The shift interruptor is only used when the prop has a load on it in the water. There is no load on the prop out of the water so its not used

 

[nola mike]

If coming from the bottom of the gimbal housing it could be the gasket for the trim hose manifold block mounted to the bottom of the housing (exterior side), transom seal gasket, or lower through bolt/anode assy (if equipped). If dripping from above could be y-pipe seal, bellows, etc....

On muffs I think has to be y-pipe itself or hose from the transom if not from the engine or other hoses.

 

[aidanmurphy]

While I am waiting for my trim manifold kit to show up I have been reading more and saw that a good way to test the seals on the drive is to pressure check them. The only slight concern I have is that the yoke seal got kinked during install. Would this be caught with a pressure check?

 

[nola mike]

While I am waiting for my trim manifold kit to show up I have been reading more and saw that a good way to test the seals on the drive is to pressure check them. The only slight concern I have is that the yoke seal got kinked during install. Would this be caught with a pressure check?

Yes. But did you find the leak?

 

[aidanmurphy]

I put the boat in the water and did not start the engine and went searching around with my hands, I was able to stick my finger in the passageway the trim hoses come through and feel the stream of water. I looked with a camera and the water is 100% coming only through the thru-hull where the trim hoses are. My understanding is that this would be related to the trim manifold? Please correct me if I am wrong

 

[alldodge]

I put the boat in the water and did not start the engine and went searching around with my hands, I was able to stick my finger in the passageway the trim hoses come through and feel the stream of water. I looked with a camera and the water is 100% coming only through the thru-hull where the trim hoses are. My understanding is that this would be related to the trim manifold? Please correct me if I am wrong

Correct

 

[aidanmurphy]

Did you guys fab up a pressure checker or buy one? I found one online but it's a bit steep at $160

 

[nola mike]

I put the boat in the water and did not start the engine and went searching around with my hands, I was able to stick my finger in the passageway the trim hoses come through and feel the stream of water. I looked with a camera and the water is 100% coming only through the thru-hull where the trim hoses are. My understanding is that this would be related to the trim manifold? Please correct me if I am wrong

Yes, your earlier posts suggested that it leaked on muffs, which wouldn't be the trim manifold

Did you guys fab up a pressure checker or buy one? I found one online but it's a bit steep at $160

I use a piece of hose with a schrader valve clamped on one end and a gear oil fitting on the other. Use a bike pump and gauge to measure. Plenty of fancy ideas if you search on here, but mine works.

 

[aidanmurphy]

Thanks I will try something like that. Sorry for the misunderstanding, I did not hook the boat up to muffs, I have a ramp in my neighborhood so I usually just trailer it down real quick for a test. But it is leaking there with the motor off. Will replace trim manifold later this week hopefully and test

 

[achris]

Drive Pressure/Vacuum Check

I have a 1995 bayliner capri, 3.0 alpha1-Gen11... I'm going to try and make up a contraption to perform a pressure check on my drive. I know I saw a post here that had someones pictures of one they had made... Can anyone help me out,, I can't seem to find it. (would this be something that NAPA...

forums.iboats.com

 

[aidanmurphy]

Does it matter if you apply pressure via the vent hold or the fill hole? I have an adapter I could use to apply pressure via the fill hole but not the vent hole.

 

[nola mike]

Does it matter if you apply pressure via the vent hold or the fill hole? I have an adapter I could use to apply pressure via the fill hole but not the vent hole.

No, but it's the same thread.

 

[aidanmurphy]

No, but it's the same thread.

Great good to know

 

[aidanmurphy]

Small update, I ended up pulling the drive back off and ordering a different alignment tool. Turns out the original one I was using did not actually slide all the way into the coupler because of a design flaw. So glad I did that, aligned the coupler and got pretty even grease on the tool. Slid in easy with two fingers. Drive went back on like a charm.

Still have an issue with the trim manifold, I replaced the manifold and the gaskets and there is still a pretty steady stream of water coming in through the trim hoses. I can stick my fingers next to the hoses from the inside and feel the water stream. Could someone point me to a diagram of how the manifold and gaskets go together? Any potential leak areas to check around the manifold? Not sure if the transom could leak through that area and it's not the manifold itself. I did take a screwdriver and push around on the transom from the inside below the trim hoses. Didn't seem like it was budging any

 

[alldodge]

there is still a pretty steady stream of water coming in through the trim hoses. I can stick my fingers next to the hoses from the inside and feel the water stream.

Water is coming in on the inside around the trim hoses, most likely the exhaust manifold is cracked of the transom assembly is cracked

There is only one gasket and pretty simple how it goes together

 

[aidanmurphy]

Water is coming in on the inside around the trim hoses, most likely the exhaust manifold is cracked of the transom assembly is cracked

There is only one gasket and pretty simple how it goes together

Neither of those sound very good.. This is with the engine off, not sure if that would make much of a difference in the exhaust manifold. I am thinking it might be the transom as this leak got a lot worse after I pulled the drive, maybe I jiggled it around and made it worse. This is a mediocre video of the leak.. Anything I could try to troubleshoot this, tightening transom nuts maybe?

New video · Friday, May 13, 2022 🎬

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photos.app.goo.gl

 

[aidanmurphy]

Neither of those sound very good.. This is with the engine off, not sure if that would make much of a difference in the exhaust manifold. I am thinking it might be the transom as this leak got a lot worse after I pulled the drive, maybe I jiggled it around and made it worse. This is a mediocre video of the leak.. Anything I could try to troubleshoot this, tightening transom nuts maybe?

New video · Friday, May 13, 2022 🎬

Tap to view!

photos.app.goo.gl