Jpzaluski

I know the magic number for the 500EFI valve spring change is 250 or so. I have a 2000 500EFI boat that had 170 hours on it when I bought it in March, just changed oil today showing 225. I think the boat had a pretty "easy" life before I owned it, and I certainly don't flog it by any means... however... will I be ok waiting till the end of the season to do these valve springs or should I consider the 250 mark to be an absolute worst case scenario and pull the boat down no matter what? Any opinions?

Boomer35

you can wait, ive seen 500's go 400-500 hrs

Griff

You will be fine. The 250hrs mark is just a good reference to start thinking about it, but plenty of people go 350hrs or more.

offthefront

iTrader: (1)

Ditto .... have you scanned the motors to see how hard the first 170 Hrs were?

THEJOKER

A visual peek can sometimes reveal some broken springs.

jeffswav

Change them out over the winter. I use the Isky endurance springs. I got them from RMbuilder on the forum.

J.B. Marshall

Mine are 2000's and I just cam in with 365hrs. I do not run mine hard cruise most of the time at 3700 rpm's/45 mph.
I think the 200/250 mark are for those who are running hard all the time and never get off the throttles, these are strong motors, just my opinion.