Merc 280 K-Planes
 

The dimensions of the 280 as per web diagram is;
Wide- 14"
Length- 19.25'
Tip- 9"

What I need to know is the length from the transom to the point where the inside angle starts, that goes to the tip. Another words, the length from the transom to the point of intersecting lines.
This way I can make a template and see if the planes will fit without interference.

Thank you very much for your time.
David..........

I'll measure mine when I ger home tonight if no one responds by than.

Just checked.........6" off the transom.

Griff, 6" of the transom, At that point the angle begins that goes to the Tip. Is that correct?

Thank you for your time......Happy New Year.

UNDERPSI68...Thank you for getting back..

If I understand your question - would nt transom width play into your question as well - inwhich you need to be asking another exact same boat owner as yours . Maybe I am over looking your question from post 1 and totally miss what exactly you are asking.

Your 292 has twin engines correct ? and how are you mounting the tabs ? following the transom line or mounting them straight across horizontal ?

Yes, the plates start narrowing at an angle 6" from the transom.

BUP I did ask with ZERO results. I did however have 44 members read my question. Possibly waiting for my results so they can change out theirs.............
Yes.............
I'm going to follow the boats bottom transom deadrise angle.

Griff, Thank you again... Ask twice, cut once.............

And in case you don't see the link in the link above...

https://www.offshoreonly.com/forums/...-my-292-a.html

Thank you Knot 4 Me

I made patterns of the Merc's 280, Hardin's 280S and the Dana HP 1000 series trim tabs. Only one had clearance for my application and that was Merc's 280 K-Planes. I'll take Barnett's ST 12 off, fill in the holes and add the K-Planes ASAP. Thank you all for your help.

You probably already know this, but the only difference between 280's and 380's are the plates. So after installing 280's you feel they didn't make the difference you were expecting you can just change to the longer 380 plates and see how the boat reacts. My money is on the 280's being more than enough tab with much quicker response than what you are used to with the factory tabs.

The 380's would be to long just by the patterns I made. There would be interference between the outdrive and tab. I could have made the Hardin 280S work. I would have modified the inner edge and shortened the front tab width. Then powder coat, not worth it.

They come in handy getting the boat off the trailer onto blocks.