My brothers new SeaCraft Tsunami
 

Just repowered with mercruiser 383 stroker.

I/O or true inboard? Couldn't tell from the pics. How much HP? Good looking rig!!

My guess is I/O based on the seating arrangement.
Very clean looking.

If it is like mine it should have 350 ponies.

Ent. I would like to compare numbers when you get a chance...:D

Very very nice Tsunami..I love the teak on the top gunnels....
Fred

I/O here is a pic

I believe 350 at the flywheel.

That is a sweet package,and a nice looking rig.I wish I had the cash at the time of the restoration to put the 383 stroker in my Tsunami.
Does your brother have any performance numbers for it? I'd be interested to hear what they are.

We will have the numbers in a few days we are still breaking in the engine. We tried a 18p 4 blade prop but didn't like it so now we are going back to 17p 3 blade.

I tried several props and ended up with a 15-1/2" x 17 pitch Mirage ss prop.It is about as close as I can get to being the best performer.
My Tsunami has less ponys(350 ci 260-275 hp) than your brothers however,and My outdrive is a Mercruiser Alpha with a 1.65 gear ratio.