50 hp Evinrude idle rough, bogging and stalling

Boat Idles Rough,bogs and stalls

Boat Stalls and bogs on Accelerate

The issues:

• It Idles rough.
• It stalls and bogs when accelerate.
• Carbs issue.
• Intake Adjustment Screw
• Where is Idle adjust screw
• How to Set Primer System

All mentioned issues stated above will be discussed below,to its best possible way.

1994 evinrude 50 Idles rough?

In this case the compression test needs to be done.On each cylinder you should get approx 115 to 12p Psi.If any of the cylinder shows less Psi,then there lies the problem.Reverse the faulty cylinder to working cylinder ans working cylinder to faulty cylinder and see if the problem reverse.If yes,then you know the cylinder is faulty and replace the cylinder to get the compression right.

If the compression is tested fine and correct on each cylinder then there is a issue with carbs.

The carbs are dirty.

To clean the carbs soak the carbs about half an hour then blew out the jets with choke cleaner,thenput it back together.

OK,WHY IT BOGS DOWN WHEN ACCELERATED?

When you accelerate the fuel flow runs to carbs.If carbs are serviced and not realigned properly the vehicle will bog down.

Also if the fuel line going to carb is not lined or fitted properly or the fuel line is getting pinched in between and causing low fuel to reach the carbs then it will bog down.

WHY TO SYNCHRONIZE THE CARBS?

If the carbs were disassemble to service and not realigned properly to its exact position then carbs needs to be re-syncronized to its exact position.

Suppose if one carb throttle plate is open more than the other it will idle rough and cause bogging and stalling. Also these are bad about roller on carb splitting and falling off, the roller that throttle arm pushes against on carb should be the size of  2 pencil and if smaller, roller is missing. 

Where is intake adjust screw?

See the diagram of intake screw to loosen to adjust will be #28 as it is in cam #14

Which the Idle adjust screw on Evinrude?

The idle adjust screw is the one that attaches the arm to both carbs.

Before spinning the screw note down its actual position.So if idle gets wrong,you know its actual position,to bring it to normal idle state.

How to prime the system?

There is the little red arrow valve on the left side above the control arms toward the back of the engine.

That little red valve is the manual setting for the primer system. Turning it the other way has the same effect as pushing in on the key for the choke position. The small handle should be lined up with the solenoid. You will feel a small click when it goes back to the position it should be.

Some cases turning that valve will make the engine receive power.And all sorts out.

But if in case this works temporarily then you definitely have carbs issue.Re-synchronize the carbs.If you are not able to set it,then get it done at proper professionals.

Suppose if turning that red valve  momentarily fixed your problem, then after a little bit the engine floods out and fuel starts flowing out from front, then that tells you that the high speed jet is plugged or needle and seat are plugged up in one or both of the carbs. They should both be removed, cleaned and carb kits installed.

This details will help.

Thanks.

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IDLE SPEED ADJUSTMENT For Acura Car Models?

Please Note This details and procedure are For Acura 1986 to 1993 car models.
Its For Acura Integra,Legend and Vigor car models.
The details are as follows :-----

Adjustments

IDLE SPEED ADJUSTMENT

Idle is not adjusted at the throttle plate stop screw. That screw is set at the factory and is not adjustable. All idle adjustments are made by turning the idle adjusting screw on the throttle body. All idle tests must be met and the idle must remain stable under all test conditions.

1986-1990 Legend

1. Start engine and warm up to normal operating temperature; the cooling fan must come on at least once.
2. Connect a tachometer.
3. Set the steering wheel in the straight-ahead or no load condition. Make certain all electrical accessories are turned OFF ; check the idle speed. Correct idle speed is 680 plus or minus 50 rpm with the transaxle in P or N .
4. Check the ECU under the front passenger seat. If the yellow LED is not lit, the idle speed is correct and no adjustment is needed. If the yellow LED is blinking, adjust the idle speed adjusting screw ¹ / ₄ turn clockwise. If the yellow LED is lit constantly-not flashing-turn the idle adjusting screw ¹ / ₄turn counter-clockwise.
5. Once adjusted, the yellow LED should turn off within 30 seconds. If it does not, turn the idle adjuster another ¹ / ₄ turn, continuing at 30 second intervals until the LED goes out.
6. Check the idle under each of the following conditions individually. Idle speed should remain stable at 680 plus or minus 50 rpm under each condition: High beam headlights and rear window defogger ON ; steering wheel turned sharply; air conditioner compressor engaged; automatic transaxle in a drive gear.

1991-93 Legend

See Figures 1 and 2

1. Start engine and warm up to normal operating temperature; the cooling fan must come on at least once. Switch the ignition OFF .
2. Connect a tachometer.
3. Disconnect the 2-pin connector on the EACV.
4. Start the engine with the accelerator pedal slightly depressed. Use the pedal to stabilize the engine speed at 1000 rpm. Slowly release the throttle until the engine idles. Check the idle with air conditioning, cooling fan and all electrical loads OFF .
5. The idle should be 450 plus or minus 50 rpm for manual vehicles and 480 plus or minus 50 rpm for automatic vehicles.
6. If the rpm is not within specifications, adjust as needed by turning the idle adjusting screw on the throttle body.
7. Switch the ignition OFF . Reconnect the connector to the EACV, then clear the ECU by removing the No. 15 fuse in the underdash fuse box for at least 10 seconds.
8. Restart the engine, allowing it to idle in N or P for 1 minute. With all electrical loads including the air conditioning and cooling fan OFF , idle speed should be 650 plus or minus 50 rpm for manual vehicles and 600 plus or minus 50 for automatic vehicles.

Fig. Fig. 1: Idle speed adjustment-Integra

Fig. Fig. 2: Idle speed adjustment-Legend

Integra

1. Apply the parking brake. Start engine and warm up to normal operating temperature; the cooling fan must come on at least once.
2. Connect a tachometer.
3. Disconnect the 2-pin connector on the EACV.
4. Check the idle with the transaxle in N or P and the air conditioning, cooling fan and all electrical loads OFF .
5. The idle should be 650 plus or minus 50 rpm.
6. If the rpm is not within specifications, adjust as needed by turning the idle adjusting screw on the throttle body. If the idle speed is excessively high, check the throttle control system.
7. Switch the ignition OFF . Reconnect the connector to the EACV, then clear the ECU by removing the BACK UP (Canadian: HAZARD, BACK-UP) fuse in the underhood relay box for at least 10 seconds.
8. Restart the engine, allowing it to idle. With all electrical loads including the air conditioning and cooling fan OFF , idle speed should be 750 plus or minus 50 rpm with the transaxle in P or N .
9. Allow the engine to idle for 1 minute with the headlight high beams and rear defogger ON . The idle speed should be 750 plus or minus 50 rpm.
10. Switch the air conditioner ON and the blower fan to HI . After 1 minute, the idle should be 750 plus or minus 50 rpm.

Vigor

See Figure 3

Fig. Fig. 3: Idle speed adjustment-Vigor

1. Start engine and warm up to normal operating temperature; the cooling fan must come on at least once. Switch the ignition OFF .
2. Connect a tachometer.
3. Disconnect the 2-pin connector on the EACV.
4. Start the engine with the accelerator pedal slightly depressed. Use the pedal to stabilize the engine speed at 1000 rpm. Slowly release the throttle until the engine idles. Check the idle with air conditioning, cooling fan and all electrical loads OFF .
5. The idle should be 550 plus or minus 50 rpm with the vehicle in P or N .
6. If the rpm is not within specifications, adjust as needed by turning the idle adjusting screw on the throttle body.
7. Switch the ignition OFF . Reconnect the connector to the EACV, then clear the ECU by removing the BACK UP fuse in the underhood fuse box for at least 10 seconds.
8. Restart the engine, allowing it to idle in N or P for 1 minute. With all electrical loads including the air conditioning and cooling fan OFF , idle speed should be 700 plus or minus 50 rpm.
9. Allow the engine to idle for 1 minute with the headlight high beams and rear defogger ON . The idle speed should be 770 plus or minus 50 rpm.
10. Turn the headlights and defogger OFF. Switch the air conditioner ON and the blower fan to HI . After 1 minute, the idle should be 770 plus or minus 50 rpm.

This details will help.

Thanks.

For more help,go to 

Car repair guide?

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