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Thread: Problems with my 300XS
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06-15-2008, 09:39 AM #165000 RPM
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Just a shot in the dark but if ya have the 1.62 gears then the props need vent holes to get her turning.. Have ya tried an overhub prop to see if the holeshot changes??
07 STROKER 300X
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06-15-2008, 09:49 AM #17" IT'S NOT HOW FAST YOU ARE, IT'S HOW COOL YOU LOOK!!! "
Check out my new website. liberatorpowerboats.com
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Ain't got no toyz, Ain't got no money! I is jus a poor Florida boy!
Visit My Liberator Boats Website
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06-16-2008, 06:11 PM #18Banned
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Dropped her off with Merctech5591 today, thanks for the help guys.....
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06-19-2008, 11:55 PM #19Banned
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Talked to Merctech5991 and he said the gaps on the plugs were all over the place and one plug had an electrode that was twisted. No one that I know of has been in the motor since it was shipped from the factory. Weird.....Hopefully I'll be picking her up tomorrow.....
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06-21-2008, 06:17 PM #20
took the boat out today for a ride.. lake was really nasty so only got 71 mph.. @5200 with a 27 trophy there's plenty more to get but had no water to run in.. . i'll be taking it to the river tomm and ive got 5 prop's to try.. i'll keep you posted..
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06-22-2008, 03:10 PM #21
lake test
well took the boat out this morning was at the lake by 7:00, it was awesome no boat's and plenty of clean water.. i tried a 30p lab bravo, 27 std bravo, 27 trophy, 25 tempest, and a 5 blade hill 26p. all prop's ran in the 70's.. best prop's for the boat was the 25p tempest, better hole shot and much more acceleration. and the 26p hill..both of these prop's ran 75-76mph. a 28 5 blade may yield a bit more speed as it would turn it up to 6200 rpm.
ryan call me up, the boat will be ready for p\u tomm.. thanks rick
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06-22-2008, 03:37 PM #22
so what was the problem?poor spark plug gaps??
why ask me ?
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06-22-2008, 05:37 PM #23Banned
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Rick, PM me your phone number, my Blackberry died and I lost all of my numbers....
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06-22-2008, 06:43 PM #24
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06-23-2008, 08:24 AM #25Markus' Performance Boating Links:
www.toastedmarshmallow.com/performance
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06-23-2008, 10:22 AM #26
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06-24-2008, 11:33 AM #275000 RPM
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ugh. well now I can add to this post.
Our 300XS has 104 hours on it. A couple weekends ago, I was out with some friends when the motor started not being able to turn the RPMs like normal (only around 5000 to 5200) and after more cruising, it got worse, and worse. No horns or error messages on the Smartcraft gauges. So then, it gets so bad, that the boat cannot even plane out.
After pulling all the plugs, the #6 plug was fouled pitch matte black.
We replaced the plug, and took it back out. It seemed to be back to normal (thank god), but that only lasted about 5 minutes. I was able to get my 6200 RPMs out of it for a brief 10 seconds or so... but then it just keeps missing (i guess) and is only good for about 5000. And the hole shot is TERRIBLE. I tried to have my dad tow me for a barefoot pull. He was WOT trying to get me surfaced... and then, once I was on my butt on the surface of the water (being very very little drag at this point) the engine KICKED and rreally messed me up.
So anyway, we pulled the #6 plug and there is carbon on it, too. Anyway... off to the shop... I'll keep yall posted.'95 Diamond-Back
'03 Triad V21
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06-24-2008, 06:36 PM #28
sounds like a bad fuel injector dumping too much fuel in that one cyl.. or a coil failing.. i guess i've been lucky with mine no problems yet..
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06-24-2008, 10:31 PM #29Banned
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I just wanted to give a big THANK YOU to Merctech5991. Rick has bent over backwards to help me out in one of the busiest times of the year for boat mechanics. He was able to quickly fix my problem and has been a pleasure to do business with. Anyone in the Houston area who needs a good Merc mechanic should look him up at Capt. Kirk's Marine in Spring. Top notch guy and a top notch outfit. THANKS AGAIN RICK!
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06-25-2008, 03:49 PM #30
Got a close friend with three 300xs and has had a bunch of coils go out lately. May not be ur problem but there are some with bad coils out there. Just something to keep in mind