96 115hp crossflow Intermittent won't rev up... But sometimes it does. Help
So it's a crossflow but a turbojet. Starts idles and runs great. Had it out today ran for 15-20 min great power no issues, then while at full throttle the rpm's just drop. Dont have a tach but speed dropped from 48 to 18. Will not power up, heading to the dock and I get occasional blips of full power then it drops off again. This has happened before but I thought it was debris in the impeller but it's not. I have tried searching but can not find what I need.
Re: 96 115hp crossflow Intermittent won't rev up... But sometimes it does. Help
Possible that a sudden drop in power is a problem with the ignition system. Likely the engine is not running on all 4 cylinders. You can check for spark with a simple test. Run the engine on the garden hose. Make sure it is fully warmed up. Pull one of the spark plug wires off one plug with a set of insulated pliers. The rpm's should drop dramatically. Replace the plugwire and do the next cyl. If one cyl does not have an rpm drop-likely it is not sparking. Or you can use an inductive timing light to check for spark. The flashes from the gun will show misfires, no fires, weak firing, etc.