To Next PageTo Next PageTo Previous PageTo Previous Page
Loading...Why does my Mercury MerCruiser MCM 7.4L MPI fluctuate rapidly at idle and then steadies as rpm is increased?
If your Mercury Engine reading fluctuates rapidly at idle but steadies as the rpm increases, the valve guides may be worn.
General| Engine Type | V8 |
|---|---|
| Bore | 4.25 in (108 mm) |
| Compression Ratio | 8.6:1 |
| Ignition System | Electronic Ignition |
| Alternator | 65 Amp |
| Displacement | 7.4L (454 cu in) |
| Fuel System | Multi-Port Fuel Injection (MPI) |
| Horsepower | 310 HP |
| Torque | 450 lb-ft |
| Cooling System | Closed Cooling |
| Fuel Requirement | 87 octane (minimum) |
| Stroke | 4.00 in (101.6 mm) |
