Yes, thru bolted. My installers just had to remove the outer exhaust manifolds to get enough access.

In the Feb 2003 issue of Powerboat magazine they have a step by step install of 280 tabs on a fastech 271. All the information should be about the same for a 292. I installed mine on my 271 with the engine out. The cheapest place to buy a Brand new Mercury kit is on Ebay. Everything needed to install all in one kit for right around 2k. Jeff Wurl

i had mine installed last year on a 292, my installer just took the engines out. it was alot easier that way

After reading up on all the positive feedback after K-plane installation on 292 Fastech, I purchased my own today.

That, and removing ST-box will be this winter's project! :)

Donzi answer
 

Just reading about the other brands on offshoreonly - did this swap on my Donzi 22ZX after talking to Chris C. the chief engineer at Donzi who designed the ZX hulls.

Basically he said the K plane was the desired tab - others were a cost cutting option. K plane has the power to hold the trim in severe load also are faster acting - they effectively lengthen the hull - my 22ZX is in effect a 23 foot hull with the 150s K plane.

Trim advantages are they really calm the hull at 80 GPS when it starts chine walking. Just drop them to neutral. Also Chris said they were mounted 3/4 to 1 inch above the hull to elimate drag caused by the tab. The Merc instructions had this with the kit.

Dr. d