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300x

  1. #1
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    Default 300x

    Educate me about it? Any problems? Max rpm? Reliable? 2004 with 155 hours. Buying a 22 mach dcb.

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  3. #2
    06 Mach 22 w/2.5 Drags twinDRAGZ's Avatar
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    Quote Originally Posted by Big Cliff View Post
    Educate me about it? Any problems? Max rpm? Reliable? 2004 with 155 hours. Buying a 22 mach dcb.
    I know several people that have the exact setup on a Mach 22. Many of them with WELL into the 200+ hour range and still running strong. It is a sweet engine no doubt, that will push that boat into the mid to high 70s, maybe even a little better. I have really not talked to anyone that has had major issues with it, other than operator error. It will run low to mid 6K RPMs at WOT, and from everyone I know personally that has one (or two) to people I have read about and talked to, it is a very reliable motor. There are also several MODs you can do to it to hop up the horsepower. You won't be disappointed in it at all.

  4. #3
    Northern CA DCB Sales Boatmaster's Avatar
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    Great motor. Run 91 octane or better fuel and good Merc oil and you will have no problems. Motor comes in at 505 lbs and spins 6900 rpm. A Mach 22 will run 90-93 mph with the right prop when conditions are right. If you PM me the motor serial # I will check on the warranty back round with Merc.

  5. #4
    06 Mach 22 w/2.5 Drags twinDRAGZ's Avatar
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    Quote Originally Posted by Boatmaster View Post
    Great motor. Run 91 octane or better fuel and good Merc oil and you will have no problems. Motor comes in at 505 lbs and spins 6900 rpm. A Mach 22 will run 90-93 mph with the right prop when conditions are right. If you PM me the motor serial # I will check on the warranty back round with Merc.
    With what prop setup? That's way faster than any single Mach 22 I have ever come across.

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    I have 300x motors on a 28skater they pull 6900 with 15x34 labs very turn key just need to change out the plastic drive shaft cover to the billet ones with 4 seals and your good to go..

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    Quote Originally Posted by twinDRAGZ View Post
    With what prop setup? That's way faster than any single Mach 22 I have ever come across.
    Wow, really? I owned a 22' Talon with single 300 Pro Max that went 102 on GPS spinning a 30" Spinelli four blade on the rev limiter at 6,400 rpm (1.62 gears). Granted, this boat was dialed-in with a 12" set-back bracket and Land & Sea hydraulic jack, but it would even see over 100 with me and a passenger (of course I'm only 160 and the girls that would be with me were barely over a hundred). Anyway, it was always my understanding that the Mach 22 would run just over 90 with a single 300. I don't think Drew's lying! Just my .02 cents.......

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    Quote Originally Posted by 28skater View Post
    I have 300x motors on a 28skater they pull 6900 with 15x34 labs very turn key just need to change out the plastic drive shaft cover to the billet ones with 4 seals and your good to go..
    My 28 Skaters w/ Pro Max's would spin the same props to the rev limiters (6,200 - 6,400) right at 110 mph. Jim Melly's 28 Skater with 300 X's has run a best of 128 mph w/ some special up-pitched 34" pitch 3 blade kilo props. It will run over 120 on any given day with his every day set of props! His 28 is by no means stock though.......from 15" mids to titanium tie bar to carbon fiber race hatch to cover the back of the cockpit. His boat is DIALED! And probably the fastest twin engine 28 I've ever heard of.......

  9. #8
    06 Mach 22 w/2.5 Drags twinDRAGZ's Avatar
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    Quote Originally Posted by Rayzor View Post
    Wow, really? I owned a 22' Talon with single 300 Pro Max that went 102 on GPS spinning a 30" Spinelli four blade on the rev limiter at 6,400 rpm (1.62 gears). Granted, this boat was dialed-in with a 12" set-back bracket and Land & Sea hydraulic jack, but it would even see over 100 with me and a passenger (of course I'm only 160 and the girls that would be with me were barely over a hundred). Anyway, it was always my understanding that the Mach 22 would run just over 90 with a single 300. I don't think Drew's lying! Just my .02 cents.......
    I absolutely am not saying he's lying at all. I played around with my buddy out at the river not long ago and was pacing him around 75-80 GPS and he looked trimmed up and pushin it. He did have 5 passengers on board though. Guess I never really asked much about its top-end. Just assumed what I had seen was about it. Trust me, I'm obviously a HUGE DCB fan and if a single 300x is truly running high 80s to low 90s, well Ill be damned!! I wonder what one of Simon's 3.4L Stokers would push one too.

    I just hit him up about it since I was curious and he says the fastest he's had his was 88 GPS. Foot in my mount about now.
    Last edited by twinDRAGZ; 02-05-2010 at 08:40 PM.

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    Senior Member STV_Keith's Avatar
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    Moneyfurnothin on here has a Simon built 300x on his Mach 22 and it runs 94-95 IIRC. Clean boat and for sale as well.
    Keith-


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    Senior Member War Canoe's Avatar
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    Default You have come to Church !

    Quote Originally Posted by Big Cliff View Post
    Educate me about it? Any problems? Max rpm? Reliable? 2004 with 155 hours. Buying a 22 mach dcb.
    Congrats on the new whacker...you will love it.

    The 300x gets shitty mileage...solid performance though...
    The 300xs will get 40% more mileage with performance that is close...

  12. #11
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    I have an 02 mach 22 with a 300x. Great boat, great motor. I have around 330 hours on it and its still running strong (knock on wood). As said previously, good gas and oil is key. I run 100octane or a mix of 91/100.

    TAKE CARE OF YOUR LOWER UNIT. First think i would do if i was you is take the boat to Lou and have him go through the lower. Make sure the drive shaft is the new style. They were having problems with the original drive shafts rusting causing the seals to wear and leak. The new shafts they changed the metal and they are not suppose to rust. Its a lot cheaper to do this work than to cook a drive and have to rebuild it. I still check/change my lower unit oil often.

    PROPS. I have run many different props. So far for all around performance my lab finished and tweaked 28 pitch bravo 4 blade is best. The other prop that ran hard on my boat was a merc chopper 2. I tried this prop during the bbsp (thanks havasu secret) last season and it worked well. Gonna pick on of these up for this season and play with it some more.

    SIMON MOTORSPORTS. Eric Simon is a 300x guy. I took my boat to him a couple seasons ago. He put his package on the boat which included a bigger intake, tuned/modified exhaust, fuel pressure adjustment, and a water diverter. I can honestly say that i noticed a big difference. The boat accelerated through the mid range much harder and picked up about 4-5 MPH on the top end. His service was great. Towed my boat to him, and towed it home 5 hours later. While he worked on my boat i hung out and picked his brain the hole time.l He was very friendly and knowledgable. His service since has been great. I have had 2 issues since. The first being having some idleing problems. I took my boat into Lou (formerly of lakeland marine) and explained the problem. I called Eric Simon and he updated Lou as to what he did to the boat. This might now seem like a big deal, but it was comforting to call Simon motorsports (on a saturday) and get Eric on the phone. The other time (on a saturday again) i lost my water pressure. He spent 30 minutes with me on the phone trying to trouble shoot. He was able to diagnose the problem, and gave me a couple suggestions. His service has always been great and i recomend him.

    SPEEDS. I have seen 94 mph so far. That was with a 4 blade 28 pitch bravo. Thats my everyday prop. It comes out of the hole strong and accelerates through the mid range hard. I feel like i might be able to squeeze a few more mph with a taller prop. You will notice a big difference between 80 degree's and 115 degrees. Heat and weight really effect this boat. With 4 people, full of fuel, ice chest, etc... and 100+temps you can expect to give up 10-15 mph. I have run the boat into the high 80's with a full load with a good head wind and some mild wind chop. You will also notice a big differnce going into the wind or running on "glass". Head wind and chop = FAST! No wind and glass = SLOW. The last thing i can think of that will come into play with speeds is your motor height. If your motor is set to low it will cost you MPH. If its to high you will not get enough water pressure/volume and you will fry the motor. Mine was set really low when i bought it. I slowly raised it one setting at a time watching my water pressure. Also if you raise it to high you will have a hard time getting the boat to roll over.

    HULL. I have 5 years with this setup and over 300 hours. I LOVE IT! I doubt you will find another hull THIS SIZE with the ride and performance of the mach 22. Its a fun boat to drive. I have been across havasu (river to channel or channel to river) on the roughest of days. While it was not fun, the boat has always got me home safe or to the shelter or the river safe. The hulls are strong. I have had it out on many rough days. I have no cracks or damage. Transom is strong and showing now signs of failure.

    Good luck with your new boat. Hopefully you find this helpfull and informative. Come on out to the bbsp in april and meet the guys. We can help you with any questions you might have.

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    Thanks for all the help guys, I'm picking it up this coming Sat. Going to do a comp test on the cylinders before I buy it. What would be good cranking comp?

    moneyfurnothin, how much were the upgrades? What speeds did you see before the upgrade? Owner told me this boat runs 80-85.

    I think the boat used to be Tobtek's on the board.

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    Leakdown % will mean more than compression . for example 4% would be very good , 6% not bad getting a bit of wear ,at 8% it will need to be pulled down ,as the % get higher the motor will wear faster .id go for a 300X as they are readibly fixable .If you break an XS oh dear ,but i just havent accepted their technology yet .

  15. #14
    Senior Member War Canoe's Avatar
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    Default Food for thought...

    The 300xs has 6 years of warranty...2 factory 4 w/ FPC Corp...

    My 19' Cougar does 108 on GPS with two 250 lb guys.
    My friends new 21 Liberator does 105 MPH...
    My friends new STV is 300xs powered and running in excess of 114 MPH....

    What is there to worry about except whos ass your going to kick next? Simon has a dealio for this motor too...365 HP firecracker...

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