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Thread: Problems with my 300XS
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07-01-2008, 04:11 PM #315000 RPM
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**Update**
two things were wrong.
The tracker valve was torn, and then they found one bad wire in a harness that goes to all six coils... causing it to malfunction.
Can't wait to get it back in the water... it's been too long!!!!!!!!!!!!!'95 Diamond-Back
'03 Triad V21
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07-01-2008, 04:30 PM #32Banned
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I know the feeling.....I thought mine was just the plug problem, but it is still not running right.....
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08-23-2008, 07:10 PM #33
300 xs probs so far
have a pair ,changed fuel filters regularly ,lost one lower at 60 hrs , changed plugs at 100 hrs ,then lost diaphragm in fuel rail on port motor.thank godfor warrantee cuz that would have been 1200$ . but all in all these things run awesome 184hrs and still singing 6200 with a set of 35 cleavers !!!!!TUNNEL T
FINAL TOUCH DETAILING
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08-23-2008, 07:15 PM #345000 RPM
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ours was outta the shop for like two weeks... then, the compressor froze. Lost a needle bearing...... good thing we were just goin slow takin it easy (40mph)... and like TUNNEL T said - thank god for warranty that compressor was over 1,000$ !!!
But 124 hrs and runnin strong too i love this motor. just a freak issue.'95 Diamond-Back
'03 Triad V21
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09-08-2008, 07:01 PM #35
I have a 300xs with 120 hours...
Issues have been
1. Cracked head...caused rough running while in gear at slow speed.
2. bad computer brain...alarm stayed on
3. lightning et 4 blade labbed props....Had 3 blades come off in 60 hours...
4. Little oil tank mounted to block cracked.
All warranty stuff including 3 new props...went to 28 and 30 choppers.
I run a 19' Cougar...What hull are you running? My friend gets only 100 MPH out of his 20.4 Stoker w/ 300xs, while I get 107+ out of mine. He was spinning only 6K rpm, I get 6400....make sure your computer brain is a 6400 rpm brain, they tried to give me a 6K brain when I had it replaced !!!The Outboard Church
OBC
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09-09-2008, 07:55 AM #36
Hey War Canoe how about some more pics of your boat, from what I can see your paint combo looks awesome
22' Activator w/ 250xs Merc Opti, back home again
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09-09-2008, 10:06 AM #37Markus' Performance Boating Links:
www.toastedmarshmallow.com/performance
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09-09-2008, 12:02 PM #38
I boat lots of hours...
My '06 22' Daytona 275 Verado has 502 hours ...
The 300xs is 1 year old with 120. If anybody is going to eat up parts, its me. First Protection Corp offers a 2+4 warranty....For 2900.00 you get 4 more years coverage on all oil lubrcated parts...I have been using outboards for 15 years, I have used 175K in warranty parts total..That spans 15 engines...Money I didn't have to dish out. I am ahead of the gameThe Outboard Church
OBC
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09-09-2008, 12:17 PM #39
Thanks...
I built this with my brother...Started a a four seat 1984 19' Cougar tunnel $1700 with trailer.
We went in line seating for balance...28 inch custom car floor shifter with Tiki Head, custom in line 27 gallon fuel tank with twin 9 gallon side tanks (stock tanks) for 45 gallon capacity. Built custon hatch cover to prevent swamping and cover the oil, battery, fuel, and trim pumps. Reinforced every interior stress point and added the 300xs for power. It has run 107 mph to date and can maintain 100 mph all day. Wide open 5 mpg from the 300xs...cruise at 75 mph and get 6+mpg...Here's a couple more pics of the build.Last edited by War Canoe; 09-09-2008 at 12:29 PM.
The Outboard Church
OBC
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09-09-2008, 12:26 PM #40
War Canoe Tattoos ...
and a shot of the Northern California fires from the boat...
The Outboard Church
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09-09-2008, 12:29 PM #41
Cool boat
I like it22' Activator w/ 250xs Merc Opti, back home again
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09-09-2008, 12:36 PM #42
Tiki-man, Classic hotrodder stuff. Nice rig.
> Stainless steel Merc cowling plates - $110 shipped TYD - LINK <
1979 16' Action Marine/2.5L Merc S3000 - Metalflake Maniac
1984 18' Contender Tunnel/2.4 Merc Bridgeport
"Where does the love of God go, when the waves turn the minutes to hours?"
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09-09-2008, 02:52 PM #435000 RPM
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mines got 110 hours on it mainly used for family skiing or ski racing.
light boat running merc et props from 26 to 32 pitch only had a set of plugs at 92 hours as could not get over 6050 rpm when it would pull limiter with 32 et boat only all day. u guys running bravo props any gd? what bout on light boat 4 ski racing?
thanks guys
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09-09-2008, 04:08 PM #44
Prop combos...
300xs 19' cougar tunnel
27 bravo labbed 4 blade....great for turns and accel..93 mph
28 merc chopper 2 ....102 mph great hole shot
30 merc chopper (ordered)expect 105+
30 lightning et labbed 4 blade ...decent holeshot, great mid and top, great cornering...105 mph on the limiter 6400
28 Lightning et labbed 4 blade...great holeshot, great mid 102 mph on the limiter Best overall performance. Problem...props good for 30 hrs max.(blades break)
32 3 blade Hoss...best top end 107 mph...does not like smooth water...
34 merc 4 blade cleaver...hated it...102 mph ..squirrley on my hull.The Outboard Church
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09-12-2008, 10:05 AM #45
I got the third motor off the line in Aug. 06. I've had it for two and a half years and still only have 66 hours on it.
When I got it I had the same problem. It just did not seem that strong. When I went to check the plugs I found the number six plug cracked through the electrode. Ran and idled fine but just down on power. That's one tight fit for that plug. I'm sure some of them came from the factory with pharked up plugs in the #6 hole.
Once I replaced the plug WHAM! I picked up 400 rpms and a whole crap load of power. Holeshot doubled and midrange acceleration came alive.
I have mine on a 22ft Bullet bassboat and I run low 90's loaded to fish with an 80lb trolling motor on the nose of the boat.
It's a bad azz motor.