Macs on a t9.9

[Nineball]

Ok,
Since the search function didn't pan out i will ask the board. Does anyone have a pic of a mac's on their t9.9? Specifically, the location of the cav plate hardware.

It says on the sticker "for yami 9.9 ht mount to bottom of cavitation plate against zincs"

If i center this bad boy up front-to-back it puts 2 of the predrilled for the cav plate through the single zinc.

I would rather see a successful install prior to having my own epic fail. Mine is a 2016.

Thanks in advance

Edit: pix added, after clamping it up it can really only be like this

 

[hunter5x5]

I went under the plate, just pull it out a little so you don't drill directly thru the zinc, I'll look for some pictures

 

[NWGuy]

It doesn't look like the bolt holes would work if you spread it open enough to go to the sides of the zinc.

 

[punted coho]

I went on top with mine. Just kinda wiggled it around till I liked the clearance. Got it away from zinc though.

 

[Barracuda1]

X2 top on my last two 9.9's

 

[Nineball]

It doesn't look like the bolt holes would work if you spread it open enough to go to the sides of the zinc.

Correct, i think this is the intended location. Someone will most likely confirm before i poke holes tomorrow.

Going back to my boeing wingline days - this placement gives me sufficient edge margin on all the holes (including the 2 that i put in the zinc ughh) while being far enough out of the radius topside for hardware to lay flat without having to counterbore/rotopeen/alodine

Anyways, i want to get my hands on a 90 or i will most likely have to remove prop and still bend a 30bit for a straight pilot

 

[punted coho]

Or drill it from the top? Pretty sure that's what I did. I eyeballed it held it with my hand and drilled through the holes in the macs with the 1/4 bit and bolted as I went.

 

[Nineball]

Huh........?

They are pretty adamate that it touches the zincs. Dissimilar metal corrosion complaints maybe? The way i read that "important!" note is twofold. One for the t9.9 and the clearance note for other users.

I think its worthy of a call tomorrow at the least. Thanks for the info fellas.

 

[punted coho]

I didn't read the words on mine. Guess I fucked up. Mine will probably just get stolen again before it can corrode.

 

[hunter5x5]

I held mine on top to drill the holes also but mounted underneath. Don't think it really matters though there's plenty of clearance to go both ways. Haven't had any corrosion issues, put Teflon washers under hardware

 

[Fog Ducker!]

Posting directions or reading them, or even acknowledging them in the box requires forfeiture of Man-card!

That's the rules!

Ducker!

 

[LJB]

Ive been pondering on this same question. Pictures would be good ?
I looked one over the other day that Defiance mounted on a new Arima
its mounted on top with the holes drilled in the gap on the zinc.

 

[Nineball]

Posting directions or reading them, or even acknowledging them in the box requires forfeiture of Man-card!

That's the rules!

Ducker!

Ok Dave you got me there. I would bring it over but i can't seem to locate my map!

I called and was told to put fasteners right through the zinc. She said that it doesn't matter if the guard is above or below the cavitation plate as long as there is 1/4" of clearance.

It will be bolted up right where it is now.

 

[Wild Bill]

Other than making it harder to remove the zincs there will be no harm in a stainless bolt touching and bonding everthing together. I mounted mine from top spreading the guard slightly to miss the zinc. You will want to use omc sealant on bolt and threads to prevent dissimilar corrosion. I put that shit on all fasteners on my outboards as it will prevent the white corrosion and makes everything come apart easily.

 

[Nineball]

Steve,
Are you talking about that omc glue that comes in a rubber cement type of container? I have some and find that stuff to be exceptional for gluing down valve cover gaskets, etc. Ford used to make a similar product but i couldn't find it last time i needed some but this stuff is as good or better.

 

[Wild Bill]

Yep that sounds like the stuff. The outdrive guy in Lowell turned me onto it. He said put that shit on everything! http://www.boatersplus.com/omc-5082...deqSOTtPM6EohlNOz8__RUk7uNCgUSWhEIaAoFN8P8HAQ

 

[Nineball]

Propguard is mounted. I did drill near the edge of the zincs more than i wanted. I persoanally think the install looks better this way but i think that there is plenty of edge margin to mount it on top of the cav plate and spread it out to miss the zinc. Overall spacing would be better as well. There is about 3/16" clearance from the prop to the bolt heads the way i did it. Oh, and thanks for the tip about the omc sealant. I also ran to Lowe's and bought the teflon washers to go under the nylocks.

 

[Chasin' Tail]

After I drilled my holes I used some Yamaha Paint to touch up the holes and edges to try and keep that paint sealed up. Applied some anti seize to bolts, nylocs and then bolted it down.

 

[Wild Bill]

No Anti seize on anything marine for me. I found out the hard way it is conductive and actually promotes dissimilar corrosion.

 

[moravec]

It looks like if you mounted to the top of the cavitation plate, the bolt pattern would clear the zinc.