1995 Mercruiser 5.7L Magnum EFI (TBI) Tournament Ski
Ser. # 0F562552
Ran great all last season and was put to bed in October '23 with zero problems. De-winterized it today and no start. This is the Throttle-Body-Injection with two injectors on the throttle body where the carb normally sits.
• Engine cranks but not trying to run
* Fuel pump runs and fuel pressure OK
* Injectors not spraying
• Sprayed starting fluid down the throttle body. Zero response. No kicking over, just cranking.
• Kill switch with lanyard installed is sending power to the engine (or at least the fuel pump)
I've checked out the EFI wiring diagram and there is a fuel injector fuse on it. Unfortunately the diagram is just a bunch of lines with no indication where that fuse might be on the engine.
So no fuel and no spark. It seems like electric systems after the fuel pump are shut down. This engine has the MeFi-1 ECU, which has a 50A breaker. Is there a way to test this breaker, or would the engine not even crank of it was tripped? I've tried pushing it in to reset, but the switch doesn't go in or click. There is also an unmarked reset button on the dash. It's the one on the far right of the photo with no switch above it. Anybody know what that might be?
Many thanks for your help, PW
Ser. # 0F562552
Ran great all last season and was put to bed in October '23 with zero problems. De-winterized it today and no start. This is the Throttle-Body-Injection with two injectors on the throttle body where the carb normally sits.
• Engine cranks but not trying to run
* Fuel pump runs and fuel pressure OK
* Injectors not spraying
• Sprayed starting fluid down the throttle body. Zero response. No kicking over, just cranking.
• Kill switch with lanyard installed is sending power to the engine (or at least the fuel pump)
I've checked out the EFI wiring diagram and there is a fuel injector fuse on it. Unfortunately the diagram is just a bunch of lines with no indication where that fuse might be on the engine.
So no fuel and no spark. It seems like electric systems after the fuel pump are shut down. This engine has the MeFi-1 ECU, which has a 50A breaker. Is there a way to test this breaker, or would the engine not even crank of it was tripped? I've tried pushing it in to reset, but the switch doesn't go in or click. There is also an unmarked reset button on the dash. It's the one on the far right of the photo with no switch above it. Anybody know what that might be?
Many thanks for your help, PW
