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Evinrude power pilot

The control goes to reverse throttle, but it only goes about 1/4 the way up when throttling up

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Posted on Jul 21, 2013

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Posted on Jan 02, 2017

  • 6 Answers

SOURCE: 35hp Johnson evinrude outboard not running at full potential

Hi, did you buy your engine used? Sounds like your gonna have to get the carb or carbs cleaned. Its possible you could have a stopped up fuel filter, or not enough spark but i am guessing its gonna be the carbs. They got some gunk in em i bet. Probably old fuel turned to gunk from setting up. I had the same problem on my 40 horse.

Posted on Aug 22, 2009

Testimonial: "Hi, thank you very much for your help, I will strip the carb down and have a look. Once again, many thanks, I am very greatful"

  • 597 Answers

SOURCE: I have a evinrude 48hp 2 cylinder oler model, that

You're not getting enough fuel. Check if there is a fuel filter than needs changed or if your gasoline is contaminated.

Posted on Sep 23, 2009

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SOURCE: 15hp Evinrude, to start must hold throttle firm

It sounds like your choke is not being used. If you are setting the choke, the carb is venting air somewhere. Take the cover off the motor and look at what is happening to the choke plate when you set the choke.

The choke plate should have either a vent on the butterfly plate if it closes tight or the butterfly plate should be ajar about the thickness of a credit card if the plate is unvented. Then check the mounting nuts on the carb base for tightness. If you want, you can put some ATV around the outside base of the carb to ensure its sealing.

Also note if there is a stepup cam for the choke RPM. This would increase the RPM with adjustment for cold starts and reduce the need to Throttle so much to cold start the engine. If it does not have this part thats Okay too, just a feature to be used if it is there.

Most likely your low speed idle mixture needs adjusting and its common to have the throttle capable of shutting off the engine without a killswitch. But try Cold starting it and see if sealing the carb base and adjusting the butterfly plate has helped. Then do the mixture adjustment if you are not happy with it.

If all this fails to help, have the engine running and try moving the throttle shaft with your fingers. You want to see if the throttle shaft has play where it pivots in the carb body. Its hard to explain but the extra venting of air can occur where the shaft rubs the casting. Depending on your talent it means you need a new carb or you need to rebuild the shaft.

Good luck on your motor.

Posted on Apr 23, 2010

Testimonial: "will give these a try thanks"

  • 42984 Answers


get a spark tester that has 2 leads and test spark .

Posted on Apr 26, 2010

  • 108 Answers

SOURCE: 1964 5 1/2 hp evinrude kills at high speed

You should have a High Speed carb adjust and a Low Speed carb adjust. If it's running fine while idling, adjust the high speed setting. If you have two nobs, its the lower one. May be set wrong. If you don't have two nobs, remove the carburator and check the jets to make sure they are completely clean or better yet, order yourself a carb rebuild kit to take care of all of this. I just rebuilt my 1971 evinrude 4hp and the carb kit made the world of difference.

Posted on May 14, 2010

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Reduced engine power message

You don't say what make an model vehicle ! But with most vehicle makes it has to do with the Throttle Actuator Control (TAC) System , electronic throttle control ! are you having reduced engine power ? There are probably DTC'S - diagnostic trouble codes stored in the PCM - engine computer .
The throttle actuator control (TAC) system is used to improve emissions, fuel economy, and driveability. The TAC system eliminates the mechanical link between the accelerator pedal and the throttle plate. The TAC system eliminates the need for a cruise control module and idle air control motor. The following is a list of TAC system components:
The accelerator pedal assembly includes the following components:

The accelerator pedal

The accelerator pedal position (APP) sensor 1

The APP sensor 2

The throttle body assembly includes the following components:

The throttle position (TP) sensor 1

The TP sensor 2

The throttle actuator motor

The throttle plate

The engine control module (ECM)

The ECM monitors the driver demand for acceleration with 2 APP sensors. The APP sensor 1 signal voltage range is from about 0.98-4.16 volts as the accelerator pedal is moved from the rest pedal position to the full pedal travel position. The APP sensor 2 range is from about 0.49-2.08 volts as the accelerator pedal is moved from the rest pedal position to the full pedal travel position. The ECM processes this information along with other sensor inputs to command the throttle plate to a certain position.
The throttle plate is controlled with a direct current motor called a throttle actuator control motor. The ECM can move this motor in the forward or reverse direction by controlling battery voltage and/or ground to 2 internal drivers. The throttle plate is held at a 7 percent rest position using a constant force return spring. This spring holds the throttle plate to the rest position when there is no current flowing to the actuator motor.
The ECM monitors the throttle plate angle with 2 TP sensors. The TP sensor 1 signal voltage range is from about 0.5-4.25 volts as the throttle plate is moved from 0 percent to wide open throttle (WOT). The TP sensor 2 voltage range is from about 4.45-0.7 volts as the throttle plate is moved from 0 percent to WOT.
The ECM performs diagnostics that monitor the voltage levels of both APP sensors, both TP sensors, and the throttle actuator control motor circuit. It also monitors the spring return rate of both return springs that are housed internal to the throttle body assembly. These diagnostics are performed at different times based on whether the engine is running, not running, or whether the ECM is currently in a throttle body relearn procedure.
Every ignition cycle, the ECM performs a quick throttle return spring test to make sure the throttle plate can return to the 7 percent rest position from the 0 percent position. This is to ensure that the throttle plate can be brought to the rest position in case of an actuator motor circuit failure. Observe, under cold conditions, the ECM commands the throttle plate to 7 percent with the ignition ON and the engine OFF to release any ice that may have formed on the throttle plate.

Aug 21, 2016 | Cars & Trucks

1 Answer

I have a 1973 evinrude 85 hp and it throttles up when you use the lever but will not throttle back down? Is it the throttle cable?

probably not as it speeds up so that means that the cable is not broken
look for a return spring at the motor end of the cable or for a loose cable connection
take it to a evinrude service shop for a correct diagnosis and quote of the problem

Mar 30, 2016 | Boating

1 Answer

What will make a johnsonew 50 hp out board motor bog when under load

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1 Answer

My 2006 Buick lacrosse reduce power light came on today--what does that mean

Reduced Engine Power
Refer to Throttle Actuator Control (TAC) System Description in Engine Controls - 3.6L or Throttle Actuator Control (TAC) System Description in Engine Controls - 3.8L
TAC System Default Actions/Reduce Power Modes
There are 2 reduce power modes that the engine control module (ECM) can default to if an error is detected in the throttle actuator control (TAC) system. If an accelerator pedal position (APP) sensor 1 or APP sensor 2 circuit fault, throttle position (TP) sensor 2 circuit fault, or if a TP sensor 1 circuit fault is detected with some APP angle, the ECM goes into one of the 2 reduce power modes. In this mode, the engine torque is limited so that the vehicle cannot reach speeds of more than 100 km/h (60 mph). The ECM remains in this reduce power mode during the entire ignition cycle even if the fault is corrected.
If there is a condition with the throttle actuator control circuits, throttle actuator command vs actual position fault, return spring check fault, or a TP sensor 1 circuit fault, the ECM goes into the other reduce engine power mode. In this mode, the engine speed is limited to 2,500 RPM and the 3-6 fuel injectors are randomly turned OFF. At this time the Reduced Power indicator is commanded ON. The ECM remains in the reduce power mode during the entire ignition cycle even if the fault is corrected. Observe, if a TP sensor 1 or throttle actuator control circuit fault is present at the time the vehicle is at idle, with no accelerator pedal angle, the engine may stall.

Jun 21, 2015 | Cars & Trucks

1 Answer

What is the adjustment knob on the throttle control arm of an evinrude 8hp for?

I think it's a idle stop. If you throttle it up a little you can turn it to the right and it will stop at a higher idle position. It won't raise and lower by simply turning it. It just limits or increases how far the throttle grip goes back to idle position. So you can set a trolling speed ect.

Aug 27, 2014 | Boating

1 Answer

2000 polaris 325 magnum will not idle adjusted carb still will not installed new plug

Your ATV not idling could be a couple different issues. First issue could be the throttle control on the right hand handle bar is not adjusted correctly. There is a box with the throttle cable coming out of it, and on the throttle cable a rubber boot butted up against the box. The Electronic Throttle Control is a safety device that will kill spark to the engine if the throttle is stuck wide open. Inside the box there are contact points that have to be a certain distance apart in order to keep from killing the spark. This can be adjusted with a thumb nut and screw on the throttle cable by the ETC. There should be no more than 1/8 inch freeplay in your thumb throttle, which is how far the throttle can be pushed before resistance is felt on the throttle. Anymore than that and the points will contact, causing your atv to not idle.
The other issue could be a plugged pilot jet in your carburetor. An easy trick to try and free up the pilot jet is to remove the air filter and start the atv. Keep it running about half throttle or so, then rev motor up and put your hand tightly against the air intake. Once it starts bogging down to the point it is going to die pull your hand away and regain engine rpm to about half throttle. Repeat those steps a few times then see if it will idle. The suction of your hand against the intake will a lot of times free up any small clogs in the pilot circuit. If these suggestions don't work, the carburetor will have to be removed and cleaned. Let me know, Daniel.

Sep 29, 2011 | Polaris ATV

1 Answer

Replace throttle cable

There are two cables leading to the throttle. Both have two pieces.
Cable 1 goes from the throttle about 12" long and connects to an adjustment piece joining it to cable2 which goes to the throttle body.
Cable 3 also goes from the throttle and is about 12" long and connects to and adjustment piece joining it to cable 4 which goes to the spring on the throttle body.
To change any of them you must loosen the adjustment piece until the ends can be removed from it.
Then to change cables 1 and 3 you have to remove the throttle cover on the grip. you will be able to see how they are removed. Then reverse these steps to install the new cable.
To change cables 2 and 4 in no more difficult but more time consuming as you will have to route these longer cables from the adjuster to where they connect to the throttle body.
When cables have been install and all parts reassembled you can carefully adjust the tension on the cables until the throttle responds the way you like it.
Hope this helps

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1 Answer


get a spark tester that has 2 leads and test spark .

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