That is stern drive gear oil.
Please don't put that in your engine.
Indmar engine manual for 2003 is Pennsoil 15w40. It is hard to find.
Where are you located? I'll try to help you source local or at least have shipping to you.
Last edited by Holdmybeer; 06-05-2025 at 02:04 PM.
2015 Moomba Mojo Surf Edition
4,000lbs
Manual Flow