Rick James

I love that this boat runs 70 with an old pair of 2.4s. I think this just goes to show us all that setup is everything. Thanks JP!

JUPITER PULSARE

Rick, I'm probably going to build some 2.5L powerheads this winter to pick up a little more speed.

JUPITER PULSARE

Just thought I'd update my old thread...In the past five months I've sold the old twin 2.4L Mercs and replaced them with a matched pair of 1994 Counter Rotating 2.5L 200's with 1998 Offshore Cowls. I've also built a bracket to spread the motors from 18" centers to 24" centers (so I can use the 1998 Offshore Cowls and get better dockside manners), raise my propshaft height, and increase setback by 1". I also bought two 2-hole CLE cases, had them powder coated and stuffed with stock 1.87 gears. Just waiting on newer front mount steering to complete the "second" rerig. I'll get some pictures and data once completed..

Haulin Aqua

Any updates JP?

JUPITER PULSARE

Wow, I guess I forgot to update this for a while. I ran the Merc 2.5L/CLE gearcase combo for much of 2016. The boat didn't get as much bow lift running the CLE gear cases and ran very level. With a full tank of gas, 24" centers and the new cabin the boat was consistently running 66-67 mph. So no speed increase over the old 2.4's at 18" centers with the new cabin. I knew the 24" centers would slow me down but I had to prepare the boat for 3.0L motors. I sold the 2.5's a few months ago and re-rigged (for the 3rd time) a low hour pair of Mercury 3.0L Carb Offshore motors. They're supposed to be about 240hp at the propshaft. I've also installed brand new Xtreme shift/throttle cables; the 30+ year old cables were getting really stiff. I'm at the very tail end of finishing up the re-rig with the 3.0L motors and should have the boat back in the water soon...I may even install a new helm while the boat is apart. I'll keep you posted. I'm hoping the torque of the 3.0L Offshores will get back into the low to mid 70's!!

JUPITER PULSARE

Time for an update. Been playing with setup on the twin Mercury 3.0L 225 carb Offshores. Started with them spinning out but didn't like the feel of the boat. It ran wet and wanted to lift the bow too much. Went back, switched the gear cases (and cables at the box) to turn the props in. The boat came alive! With 70+ gallons of gas on board, spinning Mercury Chopper 26's @ 6200 rpm the boat GPSs at 72mph banging on the rev limiters. The motors are still too deep. I'm going to raise them a couple of bolt holes and try a bigger set of wheels, maybe some Bravo One 28's. I think there's another 3-5mph in the setup and the boat should run consistently 75mph when finished! The 225hp 3.0L motors run really strong and the boat launches out of the hole!

JUPITER PULSARE

New update, On my 4th set of motors. The boat is now rigged with twin 2002 Mercury 250 EFI's. I definitely need a bigger set of wheels as I'm out of prop on the rev limiters at 5800/5900 rpm. With 26 pitch choppers at 67mph I'm showing 19-20% slip numbers.. I think I need to try some Bravo One 28's to bring my slip numbers down and speed up. If I can spin the 28's at 5800 rpm with 10% slip, speed shows 79mph!

JUPITER PULSARE

Ran the boat two Sundays ago with a brand new pair of Bravo One FS 28's and recorded a GPS speed of 74.1mph with more to go. Due to numerous boat wakes, boat traffic and safety reasons I never got the chance to stretch her out for a real top end speed number but the 74.1 that I recorded is very respectable!!! I'm sure there's another 2-4 mph if I stay on the throttle without having to back out due to boat wakes...

justintocars

Damn you make OB's sound better all the time lol.
i know I can't get that out of a 500hp I/o....

JUPITER PULSARE

We did a run to Lake Okeechobee last weekend. Round trip was 50+ miles. With 96 gallons of fuel on board and two adults, my boat ran 75.5 MPH on GPS! Not to shabby for a 34 year old boat!

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