I have a 1995 searay with this engine. First time out this season, ran great at low rpm ran very good temp is good all systems were go. We did some fast passes around the lake up to 35mph 4500rpm, did soome tight turns just to get the feel of things. All seemed to be ok. while traveling about20 mph it started to sputter as soon as that happened we headed to the launch, while waiting on launch traffic it wouldn't idle right and then quit. Could not restart got towed to the launch. Back home I checked out fuel* ok getting fuel, Checked oil* good oil no foriegn materials in oil, there is just no fire. Starter is cranking, cut-off switch is in running position. What would be the next step? Anyone have a suggestion?