Leaking exhaust divider promax

[Bunger]

Just installed new reeds, injectors , Brucato ACU and ditched my oil injection. Noticed the bottom left corner of my divider gasket is blown out and has been leaking exhaust, not water. It’s all oil/carbon built up in that corner. First question am I safe to run it for a hour or two to test the new parts. Second does this is an air leak do anything to performance? Third pro marine has a standard and a metal gasket, which ones better? Thanks!

[rock]

Don't think it would really hurt anything UNLESS it somehow gets water in that area and sucks in cold water on the #6 piston which could be catastrophic. Since I have never seen this I have never used anything other than the standard gasket. Check those surfaces closely before re-assembly. I have seen exhaust cut thru aluminum. I guess that might be a reason not to run it. Probably be safest to switch out gasket before you test new parts.


Rock

[Bunger]

Don't think it would really hurt anything UNLESS it somehow gets water in that area and sucks in cold water on the #6 piston which could be catastrophic. Since I have never seen this I have never used anything other than the standard gasket. Check those surfaces closely before re-assembly. I have seen exhaust cut thru aluminum. I guess that might be a reason not to run it. Probably be safest to switch out gasket before you test new parts.


Rock


gotcha. I’ll try to get a gasket today. I’m more of a play it safe kinda guy when it comes to exspensive stuff lol. Thanks for the reply!

[rock]

. I’m more of a play it safe kinda guy when it comes to exspensive stuff lol. !

Smart move.

Rock

[Bunger]

Please don’t tell me I have to pull the whole powerhead to change the exhaust divider gasket? Right now it’s hanging up on the lip of the damn pan and won’t slide out. Can’t get the pan off without pulling the powerhead. Is there something I’m missing?

[Capt.Insane-o]

Try taking the bolts out that hold the pan to the plate and sliding it back..seems somewhere in my memory bank that's what i had to do whenever that was lol.

[Bunger]

That may work. I decided just to pull it. I want to swap the poppet out too. I did it last year but have never felt quite right about it lol basically did it by feel
because of the pan. Now I’ll be able to do it right and sleep better at night haha. Does merc not make a poppet kit? Can’t find anything online besides the Sierra crap.

[tux974]

Yes, they do make a popet kit. Make sure the piece in the block is sitting properly.
For exhaust divider I like to use the ProMarine 2701-1 Make sure is the -1

[Bunger]

Yes, they do make a popet kit. Make sure the piece in the block is sitting properly.
For exhaust divider I like to use the ProMarine 2701-1 Make sure is the -1

10-4 is the -1 for the metal?

Does anyone know the part number for the merc poppit kit?

[Bunger]

I’m assuming to go with the high performance base gasket? Looks like a big difference between the two tho.

[Capt.Insane-o]

Use the hi perf gaskets. You need 2

[tux974]

Popet kit.
Merc-803062T1
ProM - 8030-1

PH Gasket like stated by Capt you need 2
Merc- 27-823142 (tel:27-823142)
ProM - 2693A

Divider 2701-1 this is the one I like to use and come with the motor. It is reinforced with metal like the PH gaskets.
You can get the 2701 and it’s a bit cheaper.

[Bunger]

Pulled this divider today. Starboard bank has a lot more built up carbon that the port bank. Is that kind of normal? Piston tops and plugs look identical on all 6

[Bunger]

Also how good does that rubber strip need to seal? It’s in decent shape and there’s no way that thing creates a perfect seal.

and for the poppet? The stainless washer with the the lip on it, does that lip face in towards the block or out towards the plate?

[Bunger]

Anyone? Tryin to wrap this thing up this week so I can get it back to the river this weekend.

[Merc 2.5]

I used a heavy grease to hold seal for divider. T-rex has run without it. Can u post a pic of poppit or better yet I'll post from manual

[Merc 2.5]

424171

Hope this helps

[Bunger]

I found that pic in my manual. Doesn’t show what direction the big washer with the lip on it faces. Last time I did the poppet I had water coming out of the weep hole I ended up siliconing the diaphragm to help it seal. Trying to do it right this time.

my biggest worry is why I had twice as much carbon built up on one side of the divider vs the other side ��

[Merc 2.5]

R u firing on all 6? Or could be water from gasket?

[Bunger]

Ya it ran great last time it was out and the gasket was fine except the bottom left corner it was blown out. No water jackets near there

[FORBESAUTO]

I used a heavy grease to hold seal for divider. T-rex has run without it. Can u post a pic of poppit or better yet I'll post from manual

Ole Rex liked to use a bead of ultra copper silicone, let it semi dry, then apply chap stick or something on edge of divider so silicone wouldn’t stick to it, then assemble it. Next time ya remove it the silicone stayed put and could be used over and over again.

[Merc 2.5]

Ya it ran great last time it was out and the gasket was fine except the bottom left corner it was blown out. No water jackets near there

It's hard for me to say what would cause it? Maybe sumone can shed sum lite on it

[Bunger]

The cleaner side is the side that had the exhaust plate leak. Maybe that’s why?

[Merc 2.5]

I would say very possible

[Bunger]

Is this some sort of filter? If so is it cleanable or one of those replace the whole thing mercury type of things.

[Bruce2]

Cleanable screen in there...

[Merc 2.5]

Hell what is it lol. Not a efi guy. Never owned one

[JAFFA]

I had an issue with the divider plate leaking on one of our 280 motors some time back. Turned out to be to tight a clearance in the spaghetti gasket space. We were using the hi pref orange and it was holding the plate from tightening up properly. Changed to the hollow standard clear tube and problem sorted. Just a thought

[Bunger]

Gotcha. I just put it all back togethor with the clear tube spacer deal so hopefully all is good.