Question about Motorcycles

1 Answer

2007 Yamaha F40 outboard won't idle after about one hour of running at various speeds.

Posted by Mark Bancroft on

Ad

1 Answer

Gregg Mahin

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    One Above All:

    The expert with highest point at the last day of the past 12 weeks.

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.

    Superstar:

    An expert that got 20 achievements.

  • Motorcycles Master
  • 64,934 Answers

Hi, Mark, you need to repost your question under the Yamaha F40 outboard category, not Motorcycles. Thanks, Gregg

Posted on Aug 06, 2020

Ad

5 Related Answers

mcgyver468

Mark L. Roberts Jr.

  • 710 Answers

SOURCE: 40hp 1987 yamaha outboard motor will run for 30-60

Sound like the fuel pump is not keeping up with the engine's demand. Check it out. Good luck. Hope this helps.

Posted on Apr 27, 2009

Ad

Jim Fowler

  • 23 Answers

SOURCE: my yamaha 130hp outboard starts and runs good but

The carbs need to be cleaned.There is a high speed jet in the carb that is more than likely stopped up. Jim OMC retired mech.

Posted on Jul 07, 2009

Anonymous

  • 86 Answers

SOURCE: 15 horse mercury outboard

Clogged jets in the carb...clean out carb or rebuild carb.

Posted on Aug 06, 2009

Anonymous

  • 14 Answers

SOURCE: won't run much raster than idle speed

Since there is no background to this, I assume at some point in time, the motor ran ok for you...

The first thing to do is to drain one of your carburators into a glass jar to check for water. If there is water, you will see it separate from the fuel in a couple of minutes. The water is on the bottom. If there is water, you will need to flush the motor with good fuel, one carburator at a time and probably will have to pump your tank.

If there is no water, the easiest thing to try is the following...when the motor starts to bog down, activate the choke. (If you have a side mount box that activates the choke when the fast idle lever is all the way up), you will have to have someone go back to the engine and manually pull the choke lever out. If the motor picks up, the motor is most likely in need of a carb job.

You can then do a cylinder drop test while motor is idleing, momentarily pulling the spark plug wires off of the spark plugs one at a time. If you pull one off and the engine speed does not change, listen for spark at the spark plug connector to the engine. If you hear the clicking of spark spark is probably ok. The issue with that cylinder is probably fuel related...probably a clogged carburator. If one carb is not functioning correctly, they all probably need some work. If you are not into mechanical stuff, you should have a dealer do the work. After the carbs are cleaned, they need to be adjusted for proper idle and idle/air mixture as well as vacuum balanced . If you are going to attempt it yourself be sure to by a manual either from Honda or one after market.

Before the carb job, a good dealer will always do at least a compression and spark check to be sure there is not an internal issue. The spark plugs should be checked at this time and changed out if they look questionable. Only use NGK DR7EA spark plugs not a substitute.

Also, check your oil and be sure it is clean and at the proper level.

There are several other things that it can be, but this is the most common.

Posted on Aug 10, 2009

Donald B Stoll

  • 597 Answers

SOURCE: 40 hp mariner outboard runs good in gear ,but will

You need to pull the cover and track where the trottle cable goes to on the motor. If you have someone open and close the throttle while you're watching you will find the linkage that it controls. There should be some kind of an idle ajustment screw there that you can readjust to increase your idle.

Posted on Oct 18, 2009

Add Your Answer

×

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

I have a 2012 mercury 6hp four stroke that will not idle without the choke on


Hi, Lee and the usual suspects are:
1. Fuel cap or fuel tank is not venting properly.
2. Fuel filter clogged.
3. Fuel line pinched or kinked.
4. Float needle and seat sticking.
5. Float level too low.
6. Carburetor bowl vent line clogged/blocked/pinched.
7. Idle adjusting ***** set too low.
8. Air/fuel mixture ***** set too lean.
9. Idle port, transfer ports, slow air jet clogged.
10. Slow fuel jet clogged.
11. Faulty fuel pump.
For more information about your issue and valuable "Free" downloads that you will need please Click on the links below. Good luck and have a nice day.
Boat Motor Won Stay Running Watch This
Mercury Outboard Idle Adjustment
2010 6 hp Yamaha 4 stroke wont run with choke in Page 1 iboats Boating...
8m0055686r. google this for a free manual
Won Idle Here what did to fix it Yamaha Outboard Parts Forum

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e



Apr 13, 2016 | Motorcycles

1 Answer

What would cause F40 yam outboard stsart but not idle?has been sitting forover a year


its likely the fuel at some point is pinched off with crud
gas will settle an make a varnish
not easy to clean out

May 03, 2015 | Motorcycles

1 Answer

Will not stay running


Hi, Anonymous and the usual suspects are:
1. Idle speed improperly adjusted.
2. Inlet system air leak.
3. Leaking accelerator pump.
4. Loose low-speed jet.
5. Plugged low-speed jet.
6. Contaminated or plugged low-speed circuit.
7. Enrichner valve/choke not seated or leaking.
For more information about your issue and valuable "FREE" downloads that you will need please click on the websites below. Good luck and have a nice day.
2007 Star 1100 won stay running Yamaha Forum Your Yamaha Motor Products...
2007 Star 1100 won stay running AR15 COM
http://www.sloneservices.com/SilverBack/Other-Stuff/V-StarShopManual99-07.pdf
OEM parts for Yamaha
http://www.starmotorcycles.com/assets/service/manuals/2000/LIT-11626-13-36_96.pdf

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

Mar 12, 2014 | Yamaha V Star 1100 Classic Motorcycles

1 Answer

My 2003 Yamaha r6 wont hold idle when it warms up


Hi, Anonymous and the usual suspects are:
1. Idle speed improperly adjusted.
2. Air fuel mixture screws not properly adjusted.
3. Inlet system air leak.
4. Leaking accelerator pump.
5. Loose low-speed jet.
6. Plugged low-speed jet.
7. Contaminated or plugged low-speed circuit.
8. Enrichner valve/choke not seated or leaking.
9. Multi carburetors out of sync and need to be balanced.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
Won stay on idle drops to zero rpm kinda
2007 Yamaha R6 won idle more info inside motorcycles
2003 2004 Yamaha YZF R6 Service Manual R6 Moto Data Project
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

Sep 24, 2013 | 2003 Yamaha YZF-R6

1 Answer

Motorcycle won't idle


Hi Gary, and the usual suspects are:
1. Idle speed improperly adjusted.
2. Inlet system air leak.
3. Leaking accelerator pump.
4. Loose low-speed jet.
5. Plugged low-speed jet.
6. Contaminated or plugged low-speed circuit.
7. Enrichner valve not seated or leaking.
For more information about your issue please visit the websites below. Good luck and have nice a day.
2007 Yamaha Motorcycle Service Repair Manuals

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

May 03, 2012 | 2007 Yamaha V Star Custom

1 Answer

Hello, I have a Yamaha 9.9 outboard engine, it stars without any problem. When I ref it up just above idle it dies after a few seconds. There is fuel, fuel filter in the line is no blocked.


Yamaha outboard that runs fine until heat light come on and it idles down. When light goes offf it runs fine. What is causing heat problem

Jun 06, 2009 | Yamaha Water Sport

3 Answers

40hp 1987 yamaha outboard motor will run for 30-60


Sound like the fuel pump is not keeping up with the engine's demand. Check it out. Good luck. Hope this helps.

Apr 27, 2009 | Boating

Not finding what you are looking for?
Motorcycles Logo

Related Topics:

47 people viewed this question

Ask a Question

Usually answered in minutes!

Top Motorcycles Experts

Arnie Burke
Arnie Burke

Level 3 Expert

6480 Answers

Marvin
Marvin

Level 3 Expert

85239 Answers

Muntejaya Ginting
Muntejaya Ginting

Level 3 Expert

10422 Answers

Are you a Motorcycle Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...