when to rebuild?

[sirsleepalot]

I've never torn down a full size marine engine and won't dare too, but have some questions on power output and longevity.  I'm running Pete's old 2000 Epic 22.  I bought it in 07.  It's been virtually bulletproof engine wise.  I'm starting to jones for a little more giddyup from my powerplant.  I recently had 7 adults...none heavier than 200# and two were fit females 130# or less, full ballast front and rear and couldn't get on plane to wakeboard.  I couldn't break 13-14 mph with boarder.  We rarely have more than my wife, kids or my self and another wakeboarder so I've never had this problem.  Boat's got 800+ hrs now.  Regular maintenance by marina each fall/spring.  4 blade prop.  Any ideas to improve performance?  Has anyone had their engine torn down for a rebuild yet?  Doubt I'll go that route before I buy another Epic.  I just rode in a neighbor's Air Nautique with 5 adults, 4 kids, and lots of gear and was impressed with how it got us all out of the water.  Got me thinking.

[wakejunky]

id recommend changing your plugs. sounds like you have a missfire. if the boats dont have the correct prop, it will still get to top speed just really slow. its hard to even feel the missfire. may want to clean out your MAF sensor with carb or brake clean also. there is no way that motor is worn out

[blindside]

Change your plugs (I have to do this annually) and install a properly sized acme prop will make a huge improvement in performance if it doesn't have one already.

[lilfoo2225]

yeah sounds like a tune-up is in order. these motors have plenty of power and then some. also make sure your running high octane fuel. as in for a rebuild, noway! maybe adjust valves after a 1000hrs. but probably the easiest motor ive EVER worked on. toyota really out did themselves with this engine. plus it was designed to be an IRL engine. all aluminum,dual cams,6 bolt mains and high revving. also easy to disassemble and assemble. happy boating!!

[toyotafreak]

Brent, what ACME prop are you running?

[sirsleepalot]

sounds like good advice.  I'll change plugs.  They are 3 years old and should have been changed sooner.  I have never cleaned the MAF sensor so consider that done.  I'm currently running the same 4 blade prop Pete had installed (low pitch, gets out of hole great when the power's all there.  I'll repost with results and try to be systematic.  What are you guys running for replacement bilges.  I'm currently running a Rule 800 and the automatic sensor is not reacting to water intake.  Prolly gonna grab an Attwood Tsunami.  Thanks for the inputs.