This is core only 1630 1603 ace engine for units only with the IDF (intelligent debris free system) used on 100/130/170 engines for the Switch units as well as any skis with non supercharged engines with the IDF system. Came out of low hour fresh water 2023 GTX 170. Engine shows dropped #2 cylinder intake valve. All other valves in engine appear good and clean with no signs of water intrusion that I can see.

This is an excellent core or rebuild canidate and if I had to guess I think valve dropped and got chewed out exhaust. Engines is locked up but see no damage on cases at all. This is good for 2020-2024 engines with part numbers 420160314, 420160316 and 420160317.