First time out on my 28 with the 525-last season had the 496HO--Love it!! 2 Questions, I eliminated the silent choice when I removed the 496-what are my options to quiet it down once in a while? Do them bolt on external mufflers work? What RPM's should I run at was doing 4900 BUT GPS was not working!!!

congrats, hope to splash soon!!!cosmic had a 28 with a 525, he'll probably be in here soon

my 525 ran 4951 rpms with 28 bravo 4 blade. I had corsa full time mufflers and Pat always told me that they choked the motor but I tried it without the mufflers and didn't see a difference. I loved the sound of them. Glad to see you got it out

merc 525,s should be run up to 5400 rpm or some where real close . 5200 or better. the best power is over 5000rpm .
if your running a stock prop at 4900 rpm you should try a labed one and if you can pick up 300 rpm and get the motor to 5200 rpm you will be in good shape or get a smaller prop.
i was runing my boat with a 28 pitch for 5 month's "thats what it had when i bought it" and just threw on a pair of 26 pitch and the get up and go is real nice and mid range punch is there . i was only able to get 4900 rpm out of here now i can get it up to 5300 rpms. and the motor's sound so much better . there's no lug . they whine up nice and easy .
good luck
mike

There is a Captains Call for 525's.

Cosmic what was the fastest your boat would run?

He wouldn't know cause he was SCARED of the throttle and he wasn't able to reach it when he had the lap top on the dash and stirring up chit on OSO.

Nice!

that is funny 2267 and counting, but look!!! I don't have to worry about the throttle anymore so I should be able to get that # WAY up there now. besides don't you have some motors you should be working on?

Nope cause I have someone that knows what there doing instead of me working on them.I only know how to kill them not work on them.