MerCruiser Cranks but Wont Start or Hard to Start 5 0L MPI 350 MAG MPI MX 6 2

Models these procedures apply to:

Sterndrive (MCM)

5.0L MPI Alpha and Bravo, 350 MAG MPI Alpha and Bravo, 350 MAG MPI Alpha and Bravo Horizon, MX 6.2 MPI, MX 6.2 MPI Horizon

Inboard and Tow Sports (MIE)

350 MAG MPI Inboard, 350 MAG MPI Horizon Inboard, MX 6.2 MPI Inboard, MX 6.2 MPI Horizon Inboard, 350 MAG MPI Tow Sports

Year models these procedures apply to:

2001 2002 2003 2004 2005 2006

Important Information

1. Fist figure out what engine system is causing the issue. For an engine to work, basic needs must be present, spark (ignition), fuel and compression for the engine to operate. If one of these three components are not present or not functioning correctly, the engine will not run.
2. If possible, use a diagnostic tool to determine if faults or codes are present. If codes or faults are found, fix the issue before continuing. 
3. Check and see if fuel is reaching the Schrader valve which is located directly behind the throttle body.
4. Extract the spark plugs, ensure the proper heat range, type and the spark plug is being used and is not burned, fouled or oil contaminated. 
5. Perform a compression test on the motor and make sure the motor is mechanically sound. 

Engine cranks over but will not start or starts hard

Causes

1. Flame arrestor possibly clogged or blocked.
2. Fuel pump pressure is excessive.
3. Fuel tank is empty.
4. Fuel shut off valve possibly closed.
5. Vapor lock.
6. Lean fuel system.
7. Gasoline grate to low or stale, sour fuel.
8. Fuel contaminated with water.

Action

1. Clear and clean the flame arrestor.
2. Inspect for the cause of the excessive fuel pressure, repair as necessary.
3. Add fuel to the fuel tank.
4. Turn the fuel shut off valve to open position.
5. See repair manual for vapor lock condition.
6. Clean and clear the fuel system.
7. Drain the fuel from the tank and refill.
8. Use fuel treatment to remedy the contaminated fuel. If the issue continues, drain the gas from the fuel tank and refill the tank.

NOTE: Never attempt to service your MerCruiser without a factory service manual to help guide you through service procedures. 

MerCruiser Wont Start Searches

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New 2013 Mazda CX 5 Conventional Engine Maximization

When the other car manufacturers continue to develop hybrid technology, Mazda retains combustion engine as its flagship. Because carmaker Hiroshima, Japan is more interested in the improvement of a conventional combustion engine. The application of direct injection, dual variable valve, exhaust design is to control the heat engine piston to its patented design, to attempt to get the best out of the engine capacity of 1997 cc. Not only that, the transfer engine power to the wheels was a concern. Although adopting the 6-speed automatic transmission, but the Mazda has pinned lock on each tooth. As a result the optimal energy transfer but driving smoothness is maintained.

It is enough to be felt when the condition of stop and go in the route within the city. Smooth gearshift feels like a CVT transmission type. But while on the road uphill on the route out of town, do not feel the symptoms of excessive slippage. This is indicated by a constant low engine speed with the vehicle that did not feel restrained despite the gearshift. The more fun, the Mazda transmission is also equipped with a manual mode. This role is most beneficial when the road is uphill or downhill. The driver can play the position like a gear manual transmission so the engine can be maintained or acquire securities engine brake in order to lay the fuel supply to the engine. This indication can be directly observed the driver via the on-board computer on the dashboard.

Besides the engine and transmission, aerodynamics sector also received more attention. Despite its large grille, but the CX-5 capable of flowing air very well. This can be detected from the cover under the car that is made flat as possible. Even the exhaust design was contrived so as not to impede the flow of air. Although the effect is less because we feel at highway speeds limited to 100 km / h. All of this technology is able to provide fuel consumption figure of 8.24 km / l in the route within the city. With an average speed of only 14.34 km / h. Classified as economical given the weight up to 1.5 tonnes and has a 2,000 cc engine. In the route out of town at speeds of only 34.94 km / h, the CX-5 is able to record the number 12.47 km / l - but in the on-board computer recorded the 7.4 l/100 km. With these data indicate going up 7.7% difference between the data on the computer cars with reality.

 MAZDA CX-5 TOURING:

 Machinery / 4 inline/1.997 cc capacity
 Maximum power 155 rpm dk/6.000
 Maximum torque 196 rpm Nm/4.000
 Automatic Transmission 6-speed/FWD
 Dimensions (LxWxH) 4540 x 1840 x 1705 mm
 Wheelbase 2700 mm
 Tank capacity / spare tire 56 liters / space saver
 Ground clearance is 215 mm
 Tire size 225/55 R19
 Weight 1508 kg

Saving Tricks :

By utilizing the fuel consumption in real time, the driver can control the stamping on the gas pedal to get the numbers as efficiently as possible. But for the road uphill, it does not hurt to use the manual mode because the computer often enough to maintain tooth position was no longer even the way uphill. But this can only be done by the driver is quite sensitive to the spin machine. When the car stopped in traffic jams long enough, it could not hurt to counteract friction transmission position that does not happen.

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MerCruiser Throttle Body Factory Service Reference 5 0 5 7 6 2

The following information covers factory service procedures for servicing the throttle body on MerCruiser inboard engines. Procedures applicable to the 5.0L/5.7L/6.2L MPI gasoline engines for 2001 2002 2003 2004 2005 and 2006 models. 

STERNDRIVE MCM

• 5.0L V8 MPI Alpha and Bravo
• 350 MAG MPI Alpha and Bravo
• MX 6.2L MPI Horizon
• 350 Mag MPI Alpha and Bravo Horizon
• MX 6.2L MPI

INBOARD AND TOW SPORTS (MIE)

• 350 MAG MPI Inboard
• MX 6.2 MPI Horizon Inboard
• 350 MAG MPI Horizon Inboard
• MX 6.2 MPI Inboard
• 350 MAG MPI Tow Sports

Testing and diagnosis helps determine problems and possible causes. Its important to perform extensive testing and troubleshooting prior to any major tear down or repair work. This ensures that the full extent of the problem is understood beforehand and may prevent any unnecessary repair work. Its recommended you use a factory repair manual when performing repairs on any vehicle, additional safety precautions, or technical data maybe included. 

THROTTLE BODY REMOVAL

1. Take off the engine cover and the flame arrestor. 

2. Detach the throttle linkage from the throttle body.

3. Detach the harness connector from the throttle position sensor. 

4. Take off the IAC hose from the throttle body.

5. Take off the throttle body attaching studs.

6. Remove the throttle body.

7. Take off the throttle body sealing ring and discard it. 

IMPORTANT: Place a clean towel over the opening of the intake manifold to prevent items or debris from entering the hole of the engine. 

CLEANING AND INSPECTION

IMPORTANT: Never use any cleaners that contain methyl ethyl ketone. 

IMPORTANT: Avoid getting any cleaners or solvents on the TPS (throttle position sensor).

IMPORTANT: Avoid damaging the throttle body or adapter when removing any gasket material from the throttle body and adapter.

1. Carefully remove any gasket  material from throttle body and adapter, be sure not to damage the sealing surface. 

2. Take off the IAC muffler.

3. Clean all of the throttle body parts thoroughly. Make sure that all of the passages are free of burrs, dirt and debris. 

4. Carefully check the sealing surfaces for damage that may effect the gasket from sealing. 

5. Inspect the throttle body casting for damage or cracks.

6. Check the linkage, throttle plates and other components for wear, damage and foreign material.

INSTALLATION

1. Reinstall a new throttle body sealing ring into the grove in the throttle body.

2. Reinstall the throttle body onto the upper intake manifold and align the dowels. 

3. If your going to be reusing the fasteners, first apply adhesive (Loctite 242, part number 92-809821) to the threads of the throttle body attaching studs. 

4. Reinstall the throttle body attaching studs and torque the studs to 9 Nm 80 lb-in.

5. Reinstall the IAC muffler.

6. Reinstall the throttle cable bracket.

NOTE: Make sure that the stud and nut are threading properly. Torque the throttle cable bracket nut to 19 Nm 168 lb-in.

7. Reinstall the IAC plug to the IAC hose.

8. Reinstall the flame arrestor and torque the flame arrestor retainer bracket nut to 12 Nm 108 lb-in.

9. Reinstall the engine cover.

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