When to Freshen Up 525's
#11
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Re: When to Freshen Up 525's
I'm interested what kind of problems you had with your headers. Mine cracked at the "diamond" welds where the four pipes combine to one. I got some water in my oil which clogged the filter then sent my oil temps high. Only happened on one motor for me so far. Checked the cyliners for scoring and compression everyrhing OK.
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Re: When to Freshen Up 525's
Happy New Year Everyone,
My Boat has 525's in it with about 170 hours, run in fresh water and salt water, always flush, oil changes every 25 hours on motors and 50 on the drives. Drives pulled and alignment checked 2 times a year.
My questions is when do I need to consider something more than the "routine Maintenance" on these motors?
Thanks,
Mark
My Boat has 525's in it with about 170 hours, run in fresh water and salt water, always flush, oil changes every 25 hours on motors and 50 on the drives. Drives pulled and alignment checked 2 times a year.
My questions is when do I need to consider something more than the "routine Maintenance" on these motors?
Thanks,
Mark
Your mechanic is probably pulling the drive off to grease the input shaft every 25 hours if the alignment is good and the motors are raced mounted. This is also a good habit to get into. I would start with cylinder leak down on your motors and they should be around 10%-12% with your motor and hours on them. Compression check is more of a waist of time for good info.
Have you used good quality fuel even though they only require 87 octane?
170 hours is getting up there for hours on the cylinder heads with the spring psi and fuels these days. If you are going to continue to run with out doing valve jobs just continue with cylinder leaks downs more often..
Thanks, Cam-shaft/
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Re: When to Freshen Up 525's
I'm interested what kind of problems you had with your headers. Mine cracked at the "diamond" welds where the four pipes combine to one. I got some water in my oil which clogged the filter then sent my oil temps high. Only happened on one motor for me so far. Checked the cyliners for scoring and compression everyrhing OK.
#14
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Re: When to Freshen Up 525's
CMI Sport Tubes leak unless they have the "cool collar." If your headers leak, buy new ones. They are $12k.
Been there, done that
Been there, done that
Last edited by Lucky Strike Jr; 01-02-2007 at 06:09 PM.
#15
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Re: When to Freshen Up 525's
Hey Mark ... I understand ... I'm no expert and just try to soak up some info .... Some people try to lube the Coupler and U joints in the boat ..but I'm sure removal is the way to go ...Seems the solid mounts are better too ...I lloked and almost if not ALL HP merc motors have had the solid mounts for a while. ......m
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Re: When to Freshen Up 525's
I have 310 hours on my 2003 525's. No signs of any problems but I believe that preventitive maintenance is the key to a happy boating season.
New springs, retainers, and valve job.
New CMI headers with the cool collar upgrade.
Complete drive overhaul with new gears and bearings.
Jay
New springs, retainers, and valve job.
New CMI headers with the cool collar upgrade.
Complete drive overhaul with new gears and bearings.
Jay
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Re: When to Freshen Up 525's
stop buying tubular headers and get a set of stainless marine...............they are pretty(cmi) but they always seem to give people a problem...................just a opinion .............
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Re: When to Freshen Up 525's
My S/M dry pipes are 12yrs old, only salt water, I flush them after use 1994 to 2006 and they sound great loud