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Thread: 300 xs alarm
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09-04-2018, 06:18 AM #1Member
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300 xs alarm
hey all, could use a little help. went out for a ride, motor semmed to be running a little rough, try to plane off, it wouldn't spin up. out of gear, rev it up in high idle, alarm comes on right away 1500rpm????? any ideas
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09-04-2018, 08:11 AM #25000 RPM
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If it is a racing opti 300XS, you're not supposed to rev in high idle. The TPS "learns" last idle position and will throw a code. As far as rough, need more info but fuel lines, maintenance, pulse pump, sticking thermostat come to mind as potential culprit(s).
Joe Perez
00 Triton TR21/14 Mercury 300XS Level 1.1 DBR Kit
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09-04-2018, 10:09 AM #3Screaming And Flying!
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Check to see if you lost a coil...Or a coil wire is loose or bad. Just went thru this with my opti.
83 V-King, 96 Mariner, 200 hp ff block 2.5 w/a 28p choppa
We gotta clean this liberal mess up, VOTE TRUMP TO MAGA!
Rebuild thread:
http://www.screamandfly.com/showthre...-it&highlight=
http://www.screamandfly.com/showthre...cs.&highlight=
Videos
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09-04-2018, 11:57 AM #45000 RPM
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I always start here.
http://media.channelblade.com/EProWe...rn%20chart.pdf
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09-05-2018, 05:41 AM #5Member
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09-05-2018, 06:42 AM #6Screaming And Flying!
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I have had my opti lose a coil and not make a beep. Just ran poorly. I just had a plug wire get a bad spot on it (lost that cyl) and it beeped like crazy. Beep chart helps, but is not the bible IMO. If you have a timing light, hook it up on each plug wire and run the motor and check with light. No flash no fire, shut down the motor to move to another wire. You can get a bad shock from them if not careful.
83 V-King, 96 Mariner, 200 hp ff block 2.5 w/a 28p choppa
We gotta clean this liberal mess up, VOTE TRUMP TO MAGA!
Rebuild thread:
http://www.screamandfly.com/showthre...-it&highlight=
http://www.screamandfly.com/showthre...cs.&highlight=
Videos
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09-05-2018, 06:47 AM #7Member
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09-05-2018, 02:56 PM #8
I have 3 300xs coils listed for sale at $75 each if interested?
Checkmate 2002 Convincor 270 496 MAG-HO
2003 Cougar 22MTR w/300xs SOLD
90 21Skater w/300xs - sold
98 STV Euroski w/280 - sold
2006 Trailblazer SS 6.0l 395hp
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09-10-2018, 06:26 AM #9Member
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well after checking everything i could, i caved to bring it down to the local dealer, put it up on computer. to my amazement, everything checked out fine????? he said maybe battery not putting out enough power, what, but it starts and runs???? new battery, all is good, just never know, sometimes its so simple! thanks all for the input.
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01-05-2019, 02:26 PM #105000 RPM
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Opti's can't be revved out of gear that was the cause of the alarm.
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