I do build engines, but nothing like this and never plan to. I only posted this for info and discussion on the stock Merc engines and to consolidate some info for others that search. I think if Merc put a little more info out there they would sell better....performance minded people like the details. The DTS is so damn good, I'd never go back.

I ordered rods and a few other pieces a couple months ago. Supposed to deliver before end of Feb. I'm just curious to see what kind of I-beam we are looking at to see if it could handle some boost. Lets just say that "hypothetically" the rods were made by someone like Trip Manley...and not saying they are. Just an example. They have an entry level sportsman I-beam rod, an H-beam rod, and a Pro Series I-beam. I know I regularly put 175hp per rod through a single H beam and 250-300hp through a Pro Series. Based on price I'd say its the entry level, but we shall see.

Thanks for sharing. That is pretty strong.

There probably Manley H beam like whats in the 525 that have Mercury Racing stenciled on them.


https://cimg5.ibsrv.net/gimg/www.off...9fc971372f.jpg

Both ran on the same Dyno full marine trim, power steering, water pumps, CMI exhaust etc. Superflow Dyno, list as "Standard Corrected Power". Not sure what standard was used.


https://cimg5.ibsrv.net/gimg/www.off...60c11f6836.jpg
https://cimg6.ibsrv.net/gimg/www.off...f0cd190fa9.jpg

Where those stock tune I didn't think 525's went to 5600 rpm?

I think the factory rev limit is set to 5650

Yes they were the 525s that came out of my Poker run, didn't know alot about them so we ran them on the dyno for the new owner.

Correct

The 525 and 565 are for sure. 520/540…we shall see

https://cimg5.ibsrv.net/gimg/www.off...9435d5dc0.jpeg
https://cimg6.ibsrv.net/gimg/www.off...2b763e64f.jpeg
Pretty sure it’s always been 5400 but maybe different limits for different model years?