2004 F225TXRC exhaust rebuild question

[koakley28]

hello experts!
in the standard exhaust rebuild kit, recieved from boats.net, MAR-EXHKT-04-00, it includes 2 upper casing gaskets...69J-45113-10-00 (2004&2005) and 69J-45113-20-00 (2006 and above)...
this gasket is placed between Exhaust Guide 69J-41137-10-CA and Ext 1 Manifold 69J-41131-11-CA.
the only difference i can see between the 2 gaskets is the number and placement of the small holes as seen in these 2 photos...

firstly, what is the purpose of the holes (exhaust or water flow)and what is the signifigance of the hole placement?
i ask this because the 2 components this gasket lives between doesnt seem to be different in the 2004 TXRC, 2005, 2006, etc based on the parts diagrams ive looked at on boats.net. nor do these parts appear to differ in the MAR-EXHKT available for other model years.

secondly and most imporantly, if i have installed the 45113-20 gasket in my 2004 TXRC, is this a critical error that needs to be undone?

[boscoe99]

hello experts!
in the standard exhaust rebuild kit, recieved from boats.net, MAR-EXHKT-04-00, it includes 2 upper casing gaskets...69J-45113-10-00 (2004&2005) and 69J-45113-20-00 (2006 and above)...
this gasket is placed between Exhaust Guide 69J-41137-10-CA and Ext 1 Manifold 69J-41131-11-CA.
the only difference i can see between the 2 gaskets is the number and placement of the small holes as seen in these 2 photos...

firstly, what is the purpose of the holes (exhaust or water flow)and what is the signifigance of the hole placement?
i ask this because the 2 components this gasket lives between doesnt seem to be different in the 2004 TXRC, 2005, 2006, etc based on the parts diagrams ive looked at on boats.net. nor do these parts appear to differ in the MAR-EXHKT available for other model years.

secondly and most imporantly, if i have installed the 45113-20 gasket in my 2004 TXRC, is this a critical error that needs to be undone?

Yes.

A 2004 F225TXRC uses a 69J-45111-02-8D upper casing. The 69J-45111-02-8D upper casing uses the 69J-45113-10-00 gasket.

The 69J-45113-20-00 Gasket goes with the 69J-45111-10-8D upper casing. Used on F225TXRs built in April 2005 and later.

[fairdeal]

is this a critical error that needs to be undone?

I wonder. I wonder what the holes are for - something to do with the "silencing" effect of the labyrinthine "idle port" ?
Or some other "venting"/"balancing" effect within the upper casing?

Here is the TXRD upper casing -

the "additional holes" in the later gasket would seem to communicate to the same void as the holes in the prior gasket -

what are those extra holes doing?

[boscoe99]

I wish that I knew all of the dynamics going on but don't. Have only heard of over heating issues when the wrong gaskets are used on the wrong upper casings. Yamaha has issued a bulletin about this matter and even posted an On Board article referring their mokaniks back to the service bulletin.

This is what happens when one kit is constructed to try and take care of more than one motor configuration.

If there is a 50/50 chance of getting something bass ackwards why does it seem that I have a 90% chance of choosing the wrong 50?

[pstephens46]

How often do you plug a USB device into something the correct way on the first try?

[boscoe99]

How often do you plug a USB device into something the correct way on the first try?

About 0% of the time. Simply pushing harder just does not work.

I think what I might do, just before insertion, is to rotate it 180 degrees and see what happens. Bet it still won't work. Those are some crafty devices those UBS plugs and ports.

[boscoe99]

For pstephens46, if the wrong gasket is used on the wrong casing does that mean the gasket will fit the casing. If the right gasket works on the right casing why isn't the wrong gasket on the wrong casing right?

[boscoe99]

When we want to know if someone has had a particular problem in the past why do we ask "has anyone had this problem"?

[koakley28]

for the same reason, when someone asks "are you there"? and i respond "no, i am here!" . you gentlemen are extremely entertaining i must say! i appreciate the dialogue you are having about my questions and your obvious expertise. i wish there was a more descriptive answer to FAIRLDEAL's question, as i continue to beat my head...despite the organization and prep my friend and i adhered to in undertaking this rebuild task...on twins no less...ugh...

[rodbolt17]

it's fairly simple. you read the tech bulliten. identify whether or not your casing has the 6mm hole and select the correct gasket.
why they did not put a copy in the kit I have no clue.

[boscoe99]

I give and I give and I give. And it is never enough.

Think that there may be some difference going on down below in the newer upper casing?

But back to the real stuff. Two blondes were each walking along a stream. One on one side and the other on the opposite side. One blonde said to the other, "how do I get to the other side"?. The other blonde replied "you are already on the other side".

Now fairdeal is a real crafty person. I bet he can figure out the answer about the different gaskets being used on different upper casings. If anyone can, it are he. Or is it, if someone can, he is that someone.

[boscoe99]

it's fairly simple. you read the tech bulliten. identify whether or not your casing has the 6mm hole and select the correct gasket.
why they did not put a copy in the kit I have no clue.

Instructions would make it too damn easy. Yamaha wants their mokaniks to thinketh. Or maybe simply use the parts that are called for.

[rodbolt17]

nothing much to figure, simply use the right gasket on the right case. Yamaha did print the information on how to ID it.
if it has the 6mm hole you use the gasket with the extra holes. if it does not you use the other.
engineering has already been done.

[boscoe99]

nothing much to figure, simply use the right gasket on the right case. Yamaha did print the information on how to ID it.
if it has the 6mm hole you use the gasket with the extra holes. if it does not you use the other.
engineering has already been done.

Yamaha does not expect consumers to be doing their own heavy maintenance. Yamaha expect Yamaha qualified mokaniks to be doing the maintenance. Clarifications are only provided to Yamaha qualified mokaniks. You know that. Backyardigan types do not have access to Yamaha data. Unless you or me (or is it I) get it for them.

[walleye1]