12 in. mid on a mirage jag. mod vp.

[mad man]

I am currently rigging my mod vp. 12 inch mid and bobs 6 in manual plate and by tape measure indications it does not look like im going to be at the 1 1/2 in. above the pad. is any one running this set up?

[D.B.S]

You made need a special jackplate to get low enough.

[mad man]

Yea, Thats what its looking like :nonod: . my engine is currently apart so I can not hang it. anyone have some more input?

[D.B.S]

Call hydro dynamics they can make what you need and powder coat it for around $250

[hydrostreamvking4m]

Ive got a 20 inch offshore that id be more then glad to trade ya for your 12.
I think you then can go as high or as low as you wish.:thumbsup:

Oh and also you would not have the trim pump in the boat.Makeing the rig lighter.And faster!

And last no need for paint on my mid.

[jphii]

You need 8-9" setback.

[hydrostreamvking4m]

I also have some blocks that can be used to give you from 1 inch two 2 1/2 inch more set back on your plate?
:DIts all drop and rock.:D

[jphii]

You made need a special jackplate to get low enough.

Not really. What motor are we talking about?

[hydrostreamvking4m]

He has a 260.

[jphii]

Factory mid?

[hydrostreamvking4m]

12 inch cut. but his plate will not come down to what he needs,without his hood or hoes and cables hitting his deck of the hull.

[jphii]

That's why I say 8-9". Even at 9" I can only trim so far up. Good thing is I never need to trim it that high.

[hydrostreamvking4m]

So then would a 20 inch smooth back (offshore)mid be something he should think about.Over the use of that 12inch.?

[jphii]

I like the 12".

[hydrostreamvking4m]

So with a 12 inch you need that much set back.And how does the boat run?And do you run that much set back just so you dont hit anything. or does your boat just like it.
Because as we all know the more set back the more the bow rise's And i dont know his boat but would think closer to transom would be best and still be able to use full trim tilt with out hitting anything..

[jphii]

Mine runs great like it is, and it's a combination of clearance AND the boat liking it. I gave some serious thought to cutting the transom so I could get rid of the setback. I was "strongly advised" not to **** with it by people in the know. Trim isn't an issue for me, the boat doesn't need it.

[Raceman]

The Mirage Jag that I had about 10 yrs ago had a 12" mid and a SuperSpeedmaster. We ran a foot of setback because of the mid. It possible could have gotten by with a little less. The boat didn't seem flighty, but his was an older one, (Brad Collins built).

I think some people who've commented on the mid lengths on this thread are unaware of the difference in the measurments between the 3, with the 15 inch being 5 inches shorter than the 20, but the 12" is a FULL 5 INCHES SHORTER THAN THE 15 and of course 10" shorter than the 20.

[jphii]

Remember Norris, I run a 12" on a light Collins Mod VP.

[mad man]

Thanks guys,

Just got home the comp. at the shop is down. iI have a 8 in. stationary plate maybe that with my bobs plate ? Got the rest of my bushing kit today paint this weekend ang hang it mon. then we will see where it hangs at.

[Raceman]

Remember Norris, I run a 12" on a light Collins Mod VP.

Joe, I wuz' just referrin' to the Merc stuff. I don't even know how OMC measures theirs AND on my F1 V8 the mid is actually a good bit shorter than 12" BUT the way it's positioned on the transom bracket the transom would have to be 3 or 4 inches HIGHER (can't remember the exact dimension) with the OMC stuff to have the same propshaft height. Merc, like everybody, describes their 15" 20" 25" etc mids by the transom height boat they're intended for under non high perf, clamp brackets flat on transom/cavitation plate even with the bottom of the boat numbers, rather than an actual dimension of the mid, BUT the 12" mid IS the actual dimension of the mid itself, rather than having anything to do with the transom height. For those who don't know, that's why 3 inches in description equals 5 inches in reality with Merc mids. (wish it worked that way for me too;))

[mad man]

Race man , There is a mirage in the hulls under 20 and it looks to me like the bobs plate is mounted 2-3- in. below the top of the transom. Do you see what im saying ?? Do I need to keep the plate flush on top ?

[Raceman]

It's been too long since I've fooled with Mirages to remember. (I can hardly remember last month) Meanwhile I'll see if I can find a picture of mine from the rear.

[jphii]

My mid is exactly 12". mad man, I would see if you can get it where you need it with the 8" plate.

[patchesII]

Madman... also keep in mind that the 12" is considerably lighter than the 15 or 20 so going back further like Joe is talking doesn't have the same effect as moving one of the heavier mids back. Depending on which 12" you have it could be 50-70 lbs lighter than a long ram 15". If you use an adapter plate to bolt up a shiftable gearcase the ultimate difference in length between the two is 4 3/16".

[Raceman]

My mid is exactly 12". mad man, I would see if you can get it where you need it with the 8" plate.

Joe, again, you've got to consider that comparing the Merc 12" mid to the OMC one is an apples to oranges comparison because of the orientation between the transom bracket itself on the two and of course where the front of the cowl would interfere. If you measure from where the transom bracket sits on the transom to the gearcase mounting surface you'll find that the OMC takes about a 3 inch HIGHER mounting position. Interestingly, when OMC went to the ultra short mid like my F1 from the taller one (I'm assuming the 12" one like you're running) that the two would go on the same position on the transom, meaning basically that they moved the mid DOWN on the transom bracket, placing the powerhead lower while leaving the gearcase mounting surface the same position as the taller mid in relation to the mounting bracket. Again, if you compare my F1 V8 Evinrod' (which is the second design shortest one) to any of the 12" Merc mids, you'd have to cut the transom DOWN about 3" to run the Mercs where the short OMC was bolted OR raise the transom itself the same amount to replace the Merc with the OMC. My memory is shakey (as usual:o) on the exact measurement, but 3" is in the ballpark.

[jphii]

I know they are different animals. A couple of years ago I gave some serious thought to going to a 12" 2.4 to take advantage of the (ridiculous) 225# weight break. I could have sworn when I measured the 12" Merc it was a closer match than that. But, going to one of them welfare motors was such a fleeting thought that I may be remembering the wrong measurements.

[Raceman]

My memory is so bad now I shouldn't be quotin' numbers without measuring. I'll try to do that tomorrow (if I can remember:o). You shoulda' made that change though Joe. You know what they say about never goin' back.;)