how long do they last?
 

I have a 1992 Bravo 1 on a 23 foot Checkmate. Originally powered with a 330HP 454 I've had a 496 Mag HO for the last 4 years. At almost 20 years old I'm wondering if I should have the drive rebuilt before something goes south or wait it out. The boat only weighs 3300 lbs so that's a plus but I do get a lot of air. The fluid has always been changed yearly with the merc HP stuff and I'm having no problems yet. Any opinions or experience would be appreciated?

How many hours? If it ain't broke, don't fix it!

Your. Older gears were forged much better then he newer junk. Its not overpowered so leave it and you will be fine.

They work until they break. Cost to rebuild will be the same, so why rush it?

As that why my 1994 Bravo 1's with the 1 inch prop shaft has not broke. 600hp, Maximus Props, 12,000lb boat.

Hmm, not the answer I expected but good points. I'm all about leaving it alone. Not sure aout the hours. I can scan the 496 but there's no meter left from the 454 days. Best guess is 700 or so.

The drive on my last boat had around 750 hrs on it when I sold it. The new owner lost the upper a short time later.

I know my old Outlaw has over 900 hours on B1s 454 385 mags. STILL no metal on magnets when he changes oil.
OK maybe I had to regair the Skag a time or 3 but Hey!

Ride on!