WBG28PQ

bim here is good avdice keep it stock !! maybe a filter and a shower and play with a prop or 2 these boats with the 496s run mid to upper 60s with a brovo 24 4 blade with no prob!! start messing with it and the problems are around the bend I have friends with stock 502 and 496s in performance boats with 700 plus hrs with no problems at all!!!! these pq boats are great the look goood and ride good (( but you dont take a lincon to a drag track)) if you want to go fast buy a fast boat to begin with !!! Depending on your cash flow cats are fast!!! read the fourms and talk to people on here most are pretty strait up thanks and good luck in your search!!

dockrocker

I absolutely back that up with first person GPS experience - I had a 1999 280 PQ, 502 Mag, bought new from the factory. Best I saw was 66 mph in fresh water. Lab the prop and it'll tease 70.

A Sun 288 will be generally a bit faster but I found it to be significantly smaller in the cockpit. YMMV...

BillR

My old 280 w/502 would hit 70 w/ a labbed 26P and "just" the right day. 99% of the time it was a solid 68 mph.

I did have Stainless Marine manifolds & re-programmed ECU too.
Somewhere here on OSO - I posted my prop/speed results a few times. I looked to see if I still have them - I don't.

The 280 is a great boat - and is better built w/ better hardware too. The lines are not as "sleek" as a 288, but in "my opinion", I would prefer the PQ 280.

Macklin

That was a sweet boat Bill. Rode way better than this one didn't it?

verbi69

Hey Bob.....I recently bought an '03 280 with the 496 mag ho that is completely stock with silent choice with mufflers and the best I can see on speedo is 65mph wich is 62 mph on gps. I am spinning 4700 rpm with a 26 pitch labbed prop. Recently after a fluid /filter change I had dropped 500 rpm which I am hunting for now. Before the rpm loss I was spinning 5200 with the 26 labbed and showed 67 mph on the speedo but didnt have my gps with me. Maybe I should of looked for a 280 with the 500 hp!!!

Bob280Silencer

oil & filter change and lost 500 rpm??? I would check for a vaccum line off or something of that nature.That just doesn't sound right.If you have a 1.5 gear ratio,a labbed 26 "should "be about right

verbi69

Crap.....it really pisses me off too!! I do have the 1.5 gear ratio. The boat idles fine and I havent noticed it being more sluggish out of the hole...I checked plug wires...none were off. The next thing I am going to do is pull all the plugs and have a look at them......thanks for the thought on the vacuum line, I'll check those out too. The other thing I need to do is drop a liter of oil out of the motor...the dealer put in 10 instead of the recomended 9.....but I doubt that will make the difference. I think a compression test is next.......I would love tohave this thing run 67 on gps.
Again thanks for the help

Bob280Silencer

Too much oil is really bad but I don't think 1 gt is causing your problem.make sure it's not an 8 qt pan,2 qts could cause it.Too much oil will cost you an engine. Bob

verbi69

removed 2 quarts to get to the level it needed to be at...accelerating out of the hole seemed to be a bit better.....got a little more rpm out of if too...4850- 4900 but still not at 5200 where I was. Maybe I am not over trimming any more I dont know how fast it was pulling ...the speedo quit on me!! Now I have a new issue to deal with!!

Bob280Silencer

It's always something,huh?