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Thread: 2004 2,5L Outboard $9500
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12-24-2014, 12:51 PM #165000 RPM
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nice moat
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12-24-2014, 01:35 PM #175000 RPM
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If this motor is a 280, the compression numbers if "healthy" are lower than one would expect them to be.
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12-24-2014, 02:54 PM #18Registered User
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12-24-2014, 03:51 PM #195000 RPM
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Have a nice Christmas.........the basis is on 2 healthy 280's, one mine, one my sons, and neither had the heads shaved. Do you have any leak down numbers on it?
Last edited by catfish123; 12-24-2014 at 04:15 PM.
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12-24-2014, 05:35 PM #20
Again I had a 2004 280 and several people I know compression stock is usually 145 to 150. 110 to 120 are usually on 3 liter or older merc. All my 260s where 138 to 145 . Again maybe I'm wrong
17 ACTION & 19 ACTION
1987 ACTION TVX 200 MERC ( BIG BARNEY MADE A FEW). SOLD
21 STALLION 200 PROMAX BOTTOM FELL OUT. SOLD
2004 21 EXTREME /2003 MERC PRO XB250 .SOLD
1996 STV EURO 260 TO 2004 15' 280 MERC .SOLD
1995 STV EURO 1997 260. SOLD
NEW 21 GREEN EXTREME. SOLD
1998 STV EURO USED TWICE SOLD!
1997 21 SKATER / 300XS SOLD
1987 21 SKATER /15 INCH 300 XS
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12-25-2014, 12:20 AM #21Supporting Member
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When we go through tech at the races, all of the S-Class boats read 135 to 140. This is using the same gauge on all of the motors with the throttle plate open. We all run stock 280s that are kept fresh.
Joe
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12-25-2014, 01:29 AM #22
My BONE STOCK 2005 280 had even 150 psi on all holes using a MAC TOOLS comp gauge. It had less than 50 hrs on it before I sold it. Motor still looks good and I would love to have another. The price ain't bad even if it is a little wore out. I wish I had the money. I need another one.
The evidence of poor quality lingers much longer than the success of meeting a budget.
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12-25-2014, 06:38 AM #23
145-150 psi on all three of my 280's....all bone stock.
Still would like to see pics of the lower unit.
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12-25-2014, 06:42 AM #245000 RPM
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147 to 150 on both of ours..............bone stock.
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12-25-2014, 12:07 PM #25Registered User
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Thanks for that clarification.
Thanks very much for that clarification. Exactly what I would expect boats having been gone through and ready for a race. This being a 10 year old $25000 head unit 130+ with no issues is pretty darn good in my book. Motor starts every time with just the bump on the key.
Have a Merry Christmas
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12-25-2014, 12:10 PM #26Registered User
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My mechanic, Ed Ezra, by the way is a certified marine mechanic with more than 30 years experience and is one of the most respected mechanics in Nor Cal.
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12-25-2014, 10:39 PM #27
I'd bet on gauge not being accurate. Bet if it was checked with another gauge the numbers would be better. Seen too much variation between gauges. A leak down would tell the story for sure.
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12-26-2014, 12:00 AM #28
I agree with Michael.
Have a leak down performed by your mechanic, that's the only way to know the true condition of the engine.Lee Sanderson
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12-26-2014, 07:02 AM #29
with above post!!
Better yet, I say that motor is NG and is done....I can help dispose of it....
GLWS, that's a very good price if it checks out.....
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02-17-2015, 07:38 AM #30Junior Member
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Is this motor still for sale?