300 promax or 300x??

[LdyAv8r]

What is the difference between these 2 engines? You can pick up a 1998-2000 300 promax around 9-10k used. A new 300X around 18K (youch!) haven't seen many used 300x on the market.

Does the 300promax have the same HP as 300X, just at lower RPM ? How reliable are these engines?

Are there any 2002 leftovers at a good deal anywhere? We will be making purchase in next 10 days and any suggestions are appreciated.

Thank you
Jennifer

[Capt.Insane-o]

Has a much better oil pump set up, higher rev limit and a few more ponies.

[beko21]

Jennifer, I bought a 2002 300x with 60 hrs. for 13k, call Jacos marine in Tenn. they are great people to deal with, Kevin

[LdyAv8r]

Capt, is it better to switch to premix with 300s like it is with 2.5? Are they pretty reliable oil systems up to 6300?

Thanx Kevin, just called Jacos and they have a 2002 300x for 17,800. I would prefer to found it for 13k with 60 hrs as you did. Sounds like you got a good deal!

Right now I am leaning towards a 98 300 Promax with 2001 powerhead for 9500.00 (almost 1/2 price of new one).
The bank says that I can buy a new one (and make payments for next 5 years) but it hurts me to think of payments running out 4 yrs after warranty. I had heard the 250XS is rated low on power and performs close to 300, but don't know anyone running one (but sure like the 3 yr warranty)

[Markus]

The 300X is has about 10% more power than the 300.

There do not seem to be any major reliability issues.

[beko21]

If you buy a powerhead instead of a complete motor, follow the torque sequence to the letter, I have spoke to 2 different Mercury reps that say the cyclinders can be distorted if they are not torqued properly, Mercury even makes a special tool to torque it, also if you plan on removing a powerhead down the road, you will need the removal tool they make, the new gaskets they use have a adhesive to seal them better and cannot be removed without the tool or making a tool of you own, I put a MADEFI tuner in mine and (2) 300 lb. men could not get it to break loose, with the tool it took 2 minutes, Kevin

[RUNWME]

beko.. how did you like the MADEFI tuner? Could you tell an improvement?

David

[beko21]

I'm in the middle of rigging as we speak, but I should be on the water by Sat. I'll let you know, Kevin

[StrokerOMCSS]

LdyAv8r i would think you would be money way ahead with the 250xs it is very close to the 300x on bass boats mabye 5 mph and the fuel cost saving would be a big plus and the warranty would too and there is a guy name Matt Riddle at Performance Plus Marine in Ala. a very nice guy that will treat you as fair as you will ever be treated and will match price on new Mercury Motors his number is 256 386 7001 thanks strokerga

[2scoops]

My buddy just bought a 99 300 for 5995.00 off of e-bay,It came from a place in the midwest with a 2 year warranty,It was a buy it now item!I couldnt believe it,I didnt think it would run but it was rigged and running great this past weekend!E-mail if you want the name of the place and I will get it for you.

[LdyAv8r]

250xs is 5 mph within a 300x? I had heard that 300x was approx 5 mph faster then 300 promax. Does this mean a 250xs will run with a 300 (not 300x?)

It is less expensive and warranty certainly is attractive! Do you have a boat rigged with 250xs?

2scoops sent you email. It would be great getting a 300 for 6k with 2 year warranty ready to go. I never seem to find those deals.

Jennifer
[email protected]

[jerry]

jerry will answer these questions in 2 weeks , jerry is trading up to a 300x from a 300 and the guy who im getting it from is getting 250 xs .

[LdyAv8r]

Jerry says the guy he is getting the 300x from is changing engines from 300x to a 250xs? Why is this?
Jennifer looks forward to hearing the differences in performance, but may have already purchased by that time :)

[blkmtrfan]

Jerry's getting a 300x, do you think you might break 80 now??? What lower are you going to run?

[StrokerOMCSS]

what i was saying that there was a stroker bass boat tha was running within a 300x by about 5 mph, i am not sure if the 300x was turning a big wheel or not but the guy with the 250xs went from a 2.5 280 becasue he wanted the warranty and the better fuel savings and he says he can run 88-90 fishing so if money is not an issue then the 300x is the way to go but if you want most for the buck 250xs and i too have never seen a deal like that one on a 300 that ran on ebay and i would like to have there email if i can to see if they got some parts i need thanks strokerga

[RUNWME]

Buying a new motor is tough! I wish it were like propellers in the back of someones truck where you could try them and then pay for the one that worked best on your setup.

Money is an issue. Hot Boat magazine did a test on Jennifers 21 Cougar MTR and said 89 with 225 promax 101 with 280 and 105 with 300 promax.

If you knew the 250 XS would run 95-100 then it would be the best option. But how bad would it suck to put it on, then only have 82 show on GPS (which is what is what a stock 2.4 245 hp carb Bridgeport runs on it ) and be stuck with it until payments ran out or you took a bath on selling.

There is no easy answer... just wish someone could look into a crystal ball and say... here this is the perfect option!

David

[StrokerOMCSS]

can she not call the cougar boat company and ask if they have tested with the 250xs, i know the guy who has it on his stroker and he changed the gears to the 1.62 because he was in the rev limiter and went to the 14.5 x 32 chopper so maybe you can get it with the 1.62s i do not know and i know when he raced the 300x at our rally he beat it out of the hole and thur the mids but the 300x over took on the long run and like i said before he could have had a small prop on the 300x but i do know the 300x had to get out of the water and go get gas and the 250xs still had gas even after all the fishing and playing so that is why i said money ahead on the 250xs thanks strokerga