Installing mercury jet on a G3

excav8tr

Member
Joined
Sep 10, 2006
Messages
565
Reaction score
8
Location
wasilla
jake
did several the "sandwich" way 1/4 to 3/8 aluminum & pressure treated plywood or equal for thickness.....if you don't want to have any welding done just waterproof seal up the exposed top & sandwich the sides
I've seen just plywood extensions that lasted for yrs...fyi
 

dkwarthog

New member
Joined
Dec 14, 2006
Messages
2,152
Reaction score
200
Location
Mat-Su
image.jpg

i snapped a photo of mine tonight. It's only 3/16" aluminum with a 2x2 as a spacer. But my jet is only a 35 hp. It is hell for stout. Transom will probably tear out of the hull before the extension gets damaged. I don't remember it being expensive.
 

BRWNBR

New member
Joined
Apr 25, 2006
Messages
10,027
Reaction score
507
Location
Big Lake
Wow, lots of cool ideas. Figures this forum wouldn't let me down! Lol
 

tzieli22

Member
Joined
Feb 4, 2007
Messages
600
Reaction score
23
Location
Eagle River AK
CMC's are nice but the additional 6" off the transom is very tuff on them, not so much on the water but more when trailering and the bounces on the road. If your not going to switch it out and you want cheap, get two plates of aluminum - sandwich the transom and raise your 5", then run two pieces of metal from the top of your extensions to the side gunnels. Can do it for whatever you get the metal for. If you don't care much about looks, you can even use conduit like 1", or 1 1/2" and paint.

I had the CMC on my 24' SeaArk w/150 Yamaha 4 stroke. Cracked my transom. Ended up having it pulled back in, secured with add on bracket, removed the CMC, added a slip on riser to raise my engine and I switch it out in my driveway when needed between my jet and prop. Hauled 4 guys and 4 moose, plus gear from the Koyukuk last year with my prop.
 

Top