Cobalt Boats Forum

My 2017 220S has a Merc 350 hp 6.2. I've added a little cup to the rear 3 blade prop and get a solid 56 mph at 5350 rpm with 2 adults and 1/2 tank. My elevation is just under 3000'. As most have said, go big. You will never regret it.

My 2017 220S with a 350 hp Bravo 3 Mercruiser 6.2 V-8 does 53mph/5350rpm at 2893'elev. I had a some "cup" added to rear 3 blade prop when I put the boat to bed this Fall and hope to see 55mph when she goes in next Summer. WOT range on this motor is 5000 to 5400rpm, so thinking I'll be in t...

Go with the 350hp. It will cost you more (the Merc is less $ than the Volvo). Both are duel prop drives. Volvo is all aluminum block with closed cooling, variable valve timing and direct fuel injection. If you're on salt water, I would go with the closed cooling Volvo. And certainly don't worry abou...

Big Block and Alaska: Thanks for the reply. This really is a great group of people. My 220 is very quiet up to about 45 mph (4600 rpm). You can carry on a conversation at normal levels even at this speed. The Merc 6.2L really comes on from there up to WOT. Love the motor "whine" when I ope...

You guys are kill'n me here with all this Big Block power. Please know the 6.2L 350 Hp Mercruiser was the largest power offered for my Cobalt. I get 54 mph at 5400 rpm (2893' elevation) with 91 octane no ethanol gas. Have 26 pitch props from the factory (4 blade front and 3 blade rear). Tried a set ...

L O L !!!!!! I'll get those pics ASAP.

Hey, thank's for the replies. Even though I'm a retired engineer and HVAC/Sheetmetal contractor, I'm old and will ask my 13 year old Grandson to help me with a pic.

Have had my 220S Cobalt (all white hull with gray Classic stripe and Tahoe Gray interior) now for 3 months. Just put it away for the Winter. The Cobalt is my 4th boat. I started with a 1985 16' Bayliner, then a 1990 18' Glastron, then my 2000 Regal 2100 LSR. Now I am living the "Dream" wit...