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Max Online: 36273 @ 01/23/13 02:34 PM
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#5452232 - 10/26/10 02:14 PM Compression??? 1999 Mercury 225 hp efi ??what should it be??
jsix321 Offline
Pro Angler

Registered: 01/28/09
Posts: 879
Loc: Weatherford, TX
I am thinking about the Dave Ramsey's plan and looking at a boat with a 1999 Mercury 225 hp efi engine on it. What should the compression be on this motor?
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#5452729 - 10/26/10 04:47 PM Re: Compression??? 1999 Mercury 225 hp efi ??what should it be?? [Re: jsix321]
boatman025 Offline
Angler

Registered: 07/16/10
Posts: 268
Loc: Dallas
should be around 100-110 make sure they are all with in 10%. If any cly. is higher than 15 to 20% need to have a leak down and see what the problem might be. We can check the motor out for you if needed.

Gary Hughes
Diamond Sports Marine Rockwall
972-722-7843

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#5458945 - 10/28/10 11:01 AM Re: Compression??? 1999 Mercury 225 hp efi ??what should it be?? [Re: boatman025]
jsix321 Offline
Pro Angler

Registered: 01/28/09
Posts: 879
Loc: Weatherford, TX
I believe the guy with the boat said the compression is 92 lbs. Is this not good for a 1999 boat or does it not matter how old, still should be 10-110?
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#5459743 - 10/28/10 02:33 PM Re: Compression??? 1999 Mercury 225 hp efi ??what should it be?? [Re: jsix321]
rb7764 Offline
Extreme Angler

Registered: 01/08/04
Posts: 1921
Loc: Frisco, TX, USA
I bought a boat with that same motor a few years ago. It only had 87 hours on it when I bought it and it has been bullet proof. I always run marine stabil and Quickleen in every tank. In addition to compression, I would have someone check the computer. You can see the hours, hours in different RPM ranges, any alarms (oil, temp, etc.).

Ron

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#5459866 - 10/28/10 03:03 PM Re: Compression??? 1999 Mercury 225 hp efi ??what should it be?? [Re: rb7764]
SkinnyT Online   content
Extreme Angler

Registered: 09/12/07
Posts: 1086
Loc: TX panhandle
I have a '96 Merc 225 EFI. Checked the comp. earlier this year and all were 94-96 with about 380 hours. It is still a strong motor.

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#5461151 - 10/28/10 08:45 PM Re: Compression??? 1999 Mercury 225 hp efi ??what should it be?? [Re: SkinnyT]
Progator James Offline
Angler

Registered: 06/09/08
Posts: 309
Loc: Corinth, Tx
I have a 1999 225 efi, I have used my boat alot, probably more than most people and it still runs strong! It is starting to smoke a little more than it used to but still runs strong and keeps people off your butt!!!!!

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