Mercury 565 Actual HP?
#11
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Joined: Nov 2009
Posts: 356
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From: Montreal, Canada
#12
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Joined: Sep 2013
Posts: 2,320
Likes: 1,040
From: Wisconsin
#13
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Joined: Jan 2006
Posts: 3,860
Likes: 793
From: St. Pete Beach, FL
The difference is due correction factors being different depending on the standard used.
Mercs are rated at a more conservative standard than your normal aftermarket Dyno shop. And that’s assuming the Dyno operator even uses those corrections properly. The difference is 4-7% I believe, I don’t remember exactly.
A 565 likely makes 600 on a normal aftermarket engine Dyno test.
Mercs are rated at a more conservative standard than your normal aftermarket Dyno shop. And that’s assuming the Dyno operator even uses those corrections properly. The difference is 4-7% I believe, I don’t remember exactly.
A 565 likely makes 600 on a normal aftermarket engine Dyno test.
#14
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Joined: Oct 2005
Posts: 5,825
Likes: 612
From: Clarkston, Michigan
The difference is due correction factors being different depending on the standard used.
Mercs are rated at a more conservative standard than your normal aftermarket Dyno shop. And that’s assuming the Dyno operator even uses those corrections properly. The difference is 4-7% I believe, I don’t remember exactly.
A 565 likely makes 600 on a normal aftermarket engine Dyno test.
Mercs are rated at a more conservative standard than your normal aftermarket Dyno shop. And that’s assuming the Dyno operator even uses those corrections properly. The difference is 4-7% I believe, I don’t remember exactly.
A 565 likely makes 600 on a normal aftermarket engine Dyno test.



