Motor Question

[darrenmel]

My mom bless her heart… just bought a Crestliner 2085 Sport Classic, it has a mercury 60 EFI and with only me on the boat gets like 16mph GPS !! WHAT THE!?!? does this sound right? I had a tune up done on the motor but no difference. I heard the Bigfoot motor is better for toons? Can we change the prop to a 4 blade? different pitch? LOL

Thanks in advance

[DRock]

Sounds maybe a pinch slow, but not too much. What pitch prop are you running now and at what rpm? A 4 blade will generally "bite" better, resist cavition, etc, but are about 1mph slower on top end in my experience. Also make sure the pontoons are clean. Get us the pitch and rpm and we can tell you if you're propped wrong.

[evinrude2stroke]

That may be about right. How much weight you have on it (furniture, gear, fuel, humans) makes alot of difference. My 18 footer has a 40hp and I get 18mph with me. the wife and minimal gear.

[darrenmel]

Sounds maybe a pinch slow, but not too much. What pitch prop are you running now and at what rpm? A 4 blade will generally "bite" better, resist cavition, etc, but are about 1mph slower on top end in my experience. Also make sure the pontoons are clean. Get us the pitch and rpm and we can tell you if you're propped wrong.

OK I'll get you the RPM but have no idea on the pitch?? How do you tell??

[darrenmel]

That may be about right. How much weight you have on it (furniture, gear, fuel, humans) makes alot of difference. My 18 footer has a 40hp and I get 18mph with me. the wife and minimal gear.

Hmm may be right, I was just me on it have no idea on the weight

[DRock]

Sounds maybe a pinch slow, but not too much. What pitch prop are you running now and at what rpm? A 4 blade will generally "bite" better, resist cavition, etc, but are about 1mph slower on top end in my experience. Also make sure the pontoons are clean. Get us the pitch and rpm and we can tell you if you're propped wrong.

OK I'll get you the RPM but have no idea on the pitch?? How do you tell??

There should be some numbers stamped on the hub of the prop on the outside, or on the inside of the hub(prop would have to come off to read it though).

[darrenmel]

Sounds maybe a pinch slow, but not too much. What pitch prop are you running now and at what rpm? A 4 blade will generally "bite" better, resist cavition, etc, but are about 1mph slower on top end in my experience. Also make sure the pontoons are clean. Get us the pitch and rpm and we can tell you if you're propped wrong.

OK I'll get you the RPM but have no idea on the pitch?? How do you tell??

There should be some numbers stamped on the hub of the prop on the outside, or on the inside of the hub(prop would have to come off to read it though).

Ok awesome I'll look and see Thanks!!

[DRock]

Make sure the pontoons are clean with no growths on them as well. Just a little bit of buildup can really slow these things down.

[rancherlee]

those crestliner pontoons are very heavy well built pontoons but SLOW although 16mph sounds a bit slow too me, the one I've was on would do 18-19mph with a Suzuki DF70 and a 4 people on it (took a ride on one while looking for my pontoon)

[ROLAND]

just for comparison, under absolute perfect conditions, with me and the wife on board, my yamaha 75 gets us up to approx 23 mph... thats when the lake is smooth as glass...

[Thin Ice]

Before I re-powered, I had a 60 EFI Bigfoot and i averaged 16-18 MPH. 20 MPH with perfect conditions. I would say you are pretty close, look for unnessesary weight.