225 pro max vs. 2.5 vs. 300x
01-27-2004, 07:09 PM
#22
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Originally posted by dreamboater
I have heard rumor on another sight of a 4 stroke turbo charged OB motor by merc. Havent heard much since, so that might have been just a rumor.
I have heard rumor on another sight of a 4 stroke turbo charged OB motor by merc. Havent heard much since, so that might have been just a rumor.
It is supercharged at a very low boost level; possible growth to 400hp. Not sure of octane requirement.
This is Mercs baby- no Yamaha influences as in previous 4-strokes. The torque on this engine is reported to be enormous.
Jim
01-27-2004, 08:00 PM
#23
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Originally posted by Audiofn
I would say if you want fun and reliable go with the 225. You will pick up a couple miles per hour with the 2.5 and 300's but at a HUGE increase in price and also maintenence. Remember outboards unlike big blocks can run WOT all day long.
Jon
I would say if you want fun and reliable go with the 225. You will pick up a couple miles per hour with the 2.5 and 300's but at a HUGE increase in price and also maintenence. Remember outboards unlike big blocks can run WOT all day long.
Jon
You have got to be kidding me!!! I can run wide open all day and never worry about it. I don't know of a 2.5 or 3L Merc that was meant to tool around all day at 3,500 RPM. As a matter of fact, they run better on the upper end. I'm not bumping the rev limiter but running at 6,000 RPM is average for me. The 300x is a hell of a motor. Tons of power and punch, 60amps of alternator power and it will crank every weekend. Keep water pressure in it and you can't go wrong. Sounds like a bunch of IO guys talking that have NEVER had an OB.
01-27-2004, 08:11 PM
#26
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I guess I was just buzzing thru that. He did say they "can run all day". I was thinking "what the hell is he talking about" for a second there. Forgive me, I even had a vein on my forehead get big! Ha!
01-28-2004, 08:51 AM
#27
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300X's do have explosion issues, much more so than the 2.5's, which incidentally also have a 60amp charging system and start every weekend.
Add that the 2.5 can be made A LOT more reliable, with modifications, with more power (yup you read correctly) and will give the 300X a run for the money... and when it gets rough, it will run and hide.
Add that the 2.5 can be made A LOT more reliable, with modifications, with more power (yup you read correctly) and will give the 300X a run for the money... and when it gets rough, it will run and hide.
01-28-2004, 08:59 AM
#30
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J/K.. if i where you.. i'd buy the 225 opti's and run teh hell out of them for 5years.. and if anything went wrong drop it off at a merc shop and tell them to fix it.. but the motors have to be bought before april15
