Exhaust change

[funkydrgonzo]

How often do you change the exhaust valve kit? Aquascooter says that you should change it once a year.

[Chicago_AS600]

The guy that introduced me to an Aquascooter earlier this summer got his in the mid-90s. He said not to bother changing the exhaust valve saying they leak regardless and just rev the engine out of the water to before shutting down. Before hearing this I had already replace the valve in my eBay find 600. I didn't change the valve on the 450 I revived that has been dormant for 30 years. It works fine with the old valve. I suppose it depends a lot on how it's being used. I'm full throttle most of the time and don't leave it in the water when not using.

[Hec In Omaha]

I am on my second season after replacing the exhaust valves in 3 of my AS600's. So far so good!

Hec

[Michaelnep]

Dave

As you had 1290SD as well. would you say with new exhaust and no butterfly valve the engine behavior is comparable? is your GT now as mental as SD?