Top End Speed

[BillPutney]

I'm curious as what other members speed #'s look like.Ijust read a post MM33 1984 for sale , with a 200 Yamaha on a 23 that was stating 35 mph as his top speed , someone responded as to whether that was enough power.I have a 1978 CC that was an i/o that I converted to an outboard with a bracket in 2000.I added a 36 gal. fuel tank in front of the console and a 20 gal reserve in the rear which I never use due to the extra rear weight issue.This boat otherwise is original.It has a 5'x8' hardtop and a very heavyduty support system bolted to the deck.Lots of weight I know compared to what I'seen on the site.I have a 2000 Suzuki 225 2-stroke . Before I added a Flo-scan in the fuel line I was able to run 46.5 mph.This was on a cool night with about a 6-8 in chop.After the flo-scan addition I lost a lot of rpm's.But I ran the boat last fall with my 205 lbs and a friend @220 lbs. with the main tank and the front tank completely full,112 gals. and we touched 42 mph in the waterway at Morehead City. That was the average of a run in both directions to account for the current. Do these #'s sound high or is MM 33's boat extremely slow for some reason?

[BillPutney]

Correction to the size of the hard top, I just remeasured it and it's 6'x9'.My point is this has to create a lot of drag.When you are at speed the wind whistles and squeals very loud.

[blunas2188]

I have a hard top being put on my inboard as we speak and I was worried about the same issue. However, my welder has said that the hard top, depending on the angle it is set at, can help to lift the boat out of the water at high speeds by getting some wind under it. Hope this helps.

[gss036]

42-44 mph sounds about right, that is what I am getting w/my Seacraft 23WA w/225 Honda. I also got that w/my old Merc 200. Lot of depends on the top speed thing though?

[BillPutney]

Thanks guy's since my original post on this, I did a search on the site and going back several yrs. my #'s looked OK I'm not really concerned with top end as how often do you get to run really fast when going offshore.I know most of the time the sea state just won't allow but so much speed,at least it's that way in my neck of the woods. I'm kind of depressed right now,we have had a place at the beach since 1979 but we just sold it in June and I miss it extremely bad. The boat just doesn't look right sitting under pine tree's or surrounded by Tobacco fields!!!!!!

[Bushwacker]

. . . Before I added a Flo-scan in the fuel line I was able to run 46.5 mph. . .After the flo-scan addition I lost a lot of rpm's.

That Flo-Scan meter has an orifice in it that's a potential flow restriction, which might explain loss in rpm. I hope you're running an oil injection motor! If you're mixing oil with gas in the tank and starve the motor for fuel, you're also starving it for oil!

I originally bought a 0-12 gph Flo-scan gage instead of a larger range meter because I wanted an accurate reading at cruise, and literature indicated it was ok for a 115 hp engine. During the installation however, I happened to speak to a Flo-Scan technician, who told me that those old V-4's like I had could suck up more than 20 gph at WOT! That meant I was at significant risk for leaning out the engine due to the flow restriction. He asked me to send him the gage and sending unit, which he swapped for a 24 gph unit, and then recalibrated the gage to the bigger sending unit, all at no charge! Great outfit to work with, who also probably saved me from killing the engine!

[BillPutney]

Bushwacker I have a 32 GPH gauge . My engine is an oil injected model . I very rarely run WOT. It looks like the inlet opening on the sending unit is just smaller than the fuel line leading to it.This motor has never given me a moments worth of trouble ie., always started within 2 to 3 seconds even after extended non use.I have had the engine for 8yrs. and I purchased it new.I change the plugs every year and the routine lower gear oil / water pump as needed.

[BillPutney]

blunas ,This is what my hardtop looks like [image][/image]