Originally Posted by Chris Sunkin
(Post 2703889)
I knew something like this was going to be in the first replies and I STILL laughed.
Yea, that was pretty funny. |
Originally Posted by wantingmore
(Post 2704091)
Yea, that was pretty funny.
|
The 525 has all forged internals and a full roller valve train. It's a very stout package and only pumping 8.25:1 compression ratio, it's hardly working. Plus it run's on Regular 87 octane gas (Mercury Recommended)
I think the header issue has only come into play in saltwater useage. I know of several freshwater 525's that are still operating trouble free. |
I have 300 hrs on my 02 500 EFI s in my Top gun, trouble free so far 82mph on my GPS
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Ask the racer's that run the 525 in OSS SVL, they will tell you it is a great motor package. some of the team are running the same motor for the 4th season, with just oil changes and plugs.
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Originally Posted by Gladhe8er
(Post 2703824)
Both motors should get a top-end job around 200-250 hours.
When you say rebuild top end at these hrs is that for the guys who are running WOT and pushing all the time? I know so many that have exceeded these hrs and have not touched a thing and they keep on ticking.... |
Both are great motors but personally I like the 500 because you don't have all the problems with sensors sending it into gaurdian mode. It is VERY easy and only requires a few minor changes to get a lot more power out of the 500 then what the 525 makes.
Heads, Cam and ECU reprogram and you are at 600 HP and it looks stock and idles like a stock motor. I have seen a few motors have top end problems at or around 200 hours but very few. I know of several 500's with many more hours that have been trouble free. A mercury tech at the miami show told me that most if taken care of will easiely do 400 to 500 hours. |
Originally Posted by IM4A2Z
(Post 2704145)
The 525 has all forged internals and a full roller valve train. It's a very stout package and only pumping 8.25:1 compression ratio, it's hardly working. Plus it run's on Regular 87 octane gas (Mercury Recommended)
The main differences are the cam, ECM, aluminum heads and closed cooling on the 525EFI. |
300 hrs on my 500 efi's and just had the top ends done on both, He said that they were both in great shape but better safe than sorry
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Originally Posted by Dock Holiday
(Post 2704404)
Both are great motors but personally I like the 500 because you don't have all the problems with sensors sending it into gaurdian mode. It is VERY easy and only requires a few minor changes to get a lot more power out of the 500 then what the 525 makes.
Heads, Cam and ECU reprogram and you are at 600 HP and it looks stock and idles like a stock motor. I have seen a few motors have top end problems at or around 200 hours but very few. I know of several 500's with many more hours that have been trouble free. A mercury tech at the miami show told me that most if taken care of will easiely do 400 to 500 hours. |
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