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Bill's Checkmate ZT 240 is born!

Wow, if that new tach is accurate then you can pitch up!! New motor, new drive, and you're already hitting 5300!!?? What is the recommended top end for that motor? Isn't it around 4800-5000?

1995 2100BR/1995 225 Promax 2.5 EFI/10.5" RapidJack setback/23" Tempest
 
Wow, that's 400 rpms higher than the motors used to be. That's good, you can take advantage of a slightly smaller prop (like my Promax can). Still though, I see you have a slightly higher pitched prop on the way. That's good. Looks like you need it! Break that thing in nice and easy now! Hitting the high rpms a little early aren't we?
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1995 2100BR/1995 225 Promax 2.5 EFI/10.5" RapidJack setback/23" Tempest
 
you have to go higher when losing a blade, (4 blade to 3 blade) Did not mean to go that high. Went up there in a heart beat and I back off of her. I only opened her up 3 times for about 20 seconds at the most, was too embarrassed after that after a Velecity 260 blew me away with only 55 more horsepower... I go as easy as I can, below 3000 rpm's it is horrible ride in flat water. With the tabs all the way down and the drive tucked, she still porpoised like mad... It finally wnated to cruise comfortably at 4000 rpm...
 
Let me add to my last statement, This is not a flat water boat, hence the poorer ride charicteristics at slow speed in calm water. I knew that going in, not a surprise to me. It was unusual to have calm water on the river. Although still early in the season...
 
440 and Mike W.
We have taled about water levels in the past, look in the backround of the pic of my boat and you can see the pier sitting on the sand, normally, the pier and walkway are 90% over the water, 10% over the sand...
 
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Ya I see what you mean. The water levels here arn't any better.It kept all the bigger boat's well south of me.towards the dam in deeper water.
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I kinda like it. Nice and smooth witch makes for a nice ride on a 16 footer.But it's still real early.
 
Well... this time out was pretty awesome! Unfortunately the water was a shhet of glass excepth when I came upon a few barges, but the boat came alive today! I tried the 23p Mirage I have, and although the prop is too small, man what a differece. I was running 60 on both the gps and speedo at 5200 rpm at about 80% throttle. The Bravo I ran was pegged full throttle at 5300 rpm at 54-55 mph. I can't wait to get the 25 Mirage and she what she will do. I am quite amazed at the fuel consumption so far, three days out and messing around and I have only used a little over 1/4 tank. pretty damn good. I took the silencers off and put on staight tips, now she sounds like a real boat! I am still having alot of porpoising between 3000 and 3500 rpm's, but I have a feeling that will go away as the water roughin's up. I actulayy got the boat to "dance" a little today one I was able to get some air under it. For a 24 foot offshore, she has a great feeling when running her aired out at speed. I really wanted to hammer that throttle, but did not want to be too hard on a new motor, especiall since I was already at the top of the rpm range
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Can't wait to see your boat Bill! You've got the silent choice type of exhaust right? Is it faster quiet or loud? Some have found top speed by closing the system off and running the exhaust out the prop, others find more speed going through the transom. Depends on intake tune I guess.

1995 Pulsare 2100BR/1995 Mercury Promax 225 2.5 EFI/ 1.87:1 Torquemaster/ RapidJack Heavy-Duty manual 10.5" setback/ 23" Tempest (worked for hole-shot)
 
JW, I have the exhaust that you can swith from open, thru transom or thru the prop. When I got the boat, it had silencers built into the tips off the back of the transom, Corsa claims it does not rob horsepower, but just quiets it down some. Way too queit for my taste. Noew I can feel the rumble at idle. That 6.2 litre small block sounds like a big block with the straight tips
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When I was idleing through the marina yesterday, I swithced the exhaust thru the prop when I got around the docked boats, one guy yelled to me to open the exhuast back up because it sounded so good. So I did of course!
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When you've got the right prop on it and it's all broken in, I can't wait to hear the top speed comparison numbers between the different exhaust configurations..........

1995 Pulsare 2100BR/1995 Mercury Promax 225 2.5 EFI/ 1.87:1 Torquemaster/ RapidJack Heavy-Duty manual 10.5" setback/ 23" Tempest (worked for hole-shot)
 
Bill, what was the exact engine you got?

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Webmaster
Checkmate-Boats.com-The Fanatics Home!
 
Thanks!
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Webmaster
Checkmate-Boats.com-The Fanatics Home!
 
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