Question about Sierra International 18-6756 Marine Power Tilt and Trim Motor for Johnson/Evinrude Outboard Motor ()

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1985 Evinrude 8 horsepower. Model e8rcob. Has external adjustment for idle air screw. What is the initial setting for this jet?

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  • 265 Answers

Has a base setting of 3 turns out.

Posted on Sep 25, 2017

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Posted on Jan 02, 2017

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SOURCE: 2005 ktm 520 won't idle, cleaned carb new diaphram

did you try adjusting the air fuel mix screw?

Posted on May 21, 2009

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SOURCE: Briggs & Stratton 135212/0129 - Homelite HL2500

the choke should be in the off position when running. YOU put the choke on to start it then when it starts u turn it off. If the choke is on the engine will die when reving

Posted on Aug 02, 2009

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SOURCE: Where is the idle screw, air/fuel adjustment screw on a VT750Cd

It just need to be perfect keep trying different air flows

Posted on Aug 18, 2009

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SOURCE: piaggio nrg mc3 air carbrutor idle screw and air mixture settings

A service manual is a valuable tool with an aging bike. I suggest the dealer/mfr. or Clymer books. In the meantime, go to the library reference section...646 stacks should have what you need.

Posted on Oct 13, 2009

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SOURCE: needle adjustments for 1999 Suzuki RM80 Need carb

Lightly seat the screws then open up each of them one and one half turns. This is the factory setting.

Posted on Aug 11, 2010

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My 1985 honda vt 500c will idle but when i give it gas it dies.


your mains are probably clogged due to ethanol fuels

Jun 15, 2017 | 1985 Honda VT 500 C Shadow

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How to adjust carb settings


Hi Charlie.<br />Operations to be performed depends on how much tuning is needed.<br />Carb setting regulates the ratio between air and fuel in the mixture aspired into the cylinders.Optimal air/fuel ratio is usually around 14(air) to 1(fuel). I illustrated the complete job with cleanup and jet replacement and adjustment. In some situation you do not need to perform complete tuning, which involves taking apart the carburetor. In that case perform basic regulation setup using the two adjustment screws at one side of the carb. Adjustment simple procedure starts from part 2/Adjustment. A good approach is first doing adjustment using idle and thickener screws. Then do the whole tune up if the simple adjustment does not work.<br />The complete tuning is based on carburettor cleanup, regulation of main jet and idle jet and needle setup.<br /><br />Part 1 : Complete tuning and cleanup:<br />1. Take apart the carburettor,<br />2. Undo the float chamber(6 in diag) held by screws (26 in diag).<br />3. Clean bowl with with carb cleaner (put a lot of it in the bow, wait a bit and dispose it-finish the job with a cloth if needed) . Clean floats (nr.4) and other parts using carb cleaner and cloth.<br />4. Use a flat screwdriver to remove the main jet screw (placed in the chamber, held by big golden screw, goes between the floats). Spray the main jet. You must be able to see through it.<br />5. Use the carb cleaner to clean the accelerating pump and all the other parts inside the part. Needle and small parts must be cleaned. Clean the idle jet, which is the smaller golden screws. If you have a compressor blow into the jets (you can blow them even without compressor, but follow H&S).<br />6. If possible replace main and idle jets. Sometimes you may like to replace the jet with a bigger one to get a richer mixture.<br />7. Adjust the needle if needed. A lower needle settings means a richer mixture.<br />8. Remove idle adjustment screw (7) and main adjustment screw(31), clean them screw them back in without tightening and perform part 2. Leave the screws about one and half turn from all way in.<br /><br />Part 2: Tuning and minor cleanup - Here you mainly operate on idle and air (thickener) adjustment screws (8 and 12 in diag)- Start from here, if this does not work, do part one:<br /><br />1) If the engine runs start from idle adjustment: screw or unscrew the idle regulator to adjust the idle speed, the screw is placed to one side of the carburetor and has a spring (part 12).<br />Keep idle least slightly higher than the minimum needed. Example, if the engine stays on slightly below 1000 rpm, set idle to a bit higher with engine revving above 1000 rpm.<br /><br />2) The thickener, placed near that of the minimum screw regulates the air flow. Tighten the screw and unscrew 2 turns from all the way in. Do regulation from this position. <br /><br />Here carburetor diagram and part list. The diagram is taken from service manual. The manual for Lifan 150 (does not include carb setting) has been uploaded here:<br /><br />http://www.mediafire.com/?o3r8x2ujrdbfb6o

on Oct 29, 2011 | 2008 Lifan Delta 250 V Twin

1 Answer

I have a 1982 yamaha vision 550 i have it runnin but hard to find a smooth idle choke to high idle real fast choke to low it dies


Hi, Renee 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 screw set too low.
8. Air/fuel mixture screw 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 blue links below. Good luck and have a wonderful day.
Owning Vision FAQ
Hard starting can open choke
Yamaha XZ550 XZ 550 1982 1985 Factory Service Repair Manual Download...
OEM parts for Yamaha
Yamaha XZ550 Vision Carburetor Overhaul Pt 1 Getting Started

Jul 15, 2012 | 1982 Yamaha XZ 550

1 Answer

I have a 1985 Yamaha Virago 699cc.. It starts up and idles but dies when I give throttle?


Hi, Timothy 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.
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.
http://viragotech.com/newtech/Only%20starts%20idles%20on%20choke%20dies%20when%20you%20give%20it%20gas%20(SOLVED).htm
Bike idles perfect but dies when given the slightest amount of throttle 93...
Yamaha XJ700N Service Manual
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-xj-owners-manuals

Apr 04, 2012 | 1985 Yamaha XJ 700 X Maxim

1 Answer

1985 maxim x 700 has trouble starting sometimes and wants to idle at 4000 rpm or stalls when adjusted, just rebuilt the carburetor still won't idle correctly


Hi, Dlmninja 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.
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.
bike idling high
82 1100i surging bit 4000 rpm
Yamaha XJ700N Service Manual
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-xj-owners-manuals

Jul 21, 2011 | 1985 Yamaha XJ 700 X Maxim

1 Answer

2000 Yamaha YZ 80 poor idling


Hi, Shaundavies6 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 blue links below. Good luck and have a wonderful day.
Yz 80 2001 model Carburetor tunning Trouble
Life On 2 Wheels
Yamaha YZ80 service manual repair 2001 YZ 80 YZ80LW Download Manuals... $8 cheap
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals

Oct 24, 2010 | Yamaha Motorcycles

1 Answer

I have a primary jet and secondary jet in the carburator of the 500 gl silverwing . and the jets I have is 75 and 125 which goes where . and what should be the setting on the air jet ?


The secondary main jet (125) goes into the jet needle holder in the center of the carb (needle). The primary main jet (75) is between the secondary main jet and the pilot screw (this one is slightly off center) . The start setting for your air screw should be 1 3/4 turns. Warm up your engine and drive for ten minutes. Adjust your idle speed to 1100 + or - 100 rpm. Now turn pilot screw in or out to get highest idle speed. Readjust idle to 1100 rpm. Now turn pilot screw in till idle speed drops 100 rpm. If pilot screw seats go to next step. Adjust the pilot screw out 1 full turn from 100 rpm drop point. Now reset Idle to 1100 rpm. That is how Honda says to set your air screw. Standard setting is probably sea level and going through the procedure will set you up for the altitude where you ride. Do the adjustment during good weather at the altitude you plan to do the most riding.

Aug 27, 2010 | Honda CX 500 B Motorcycles

1 Answer

Carbs cleaned but bike will not idle properly


The pilot jet controls the idle. Check your service manual for the jet location. Chances are the jet is plugged up by varnish. Count the number of turns as you turn the adjuster screw INWARD until it LIGHTLY seats. Now remove the adjuster screw. Clean the jet and then put the adjuster screw in and LIGHTLY seat it. Turn the adjuster out the same number of turns as originally counted. Don't seat the screw too tight because you can screw up the jet if you do. Remove the actual jet only if you must.

Please rate this answer. Thanks Shawn! Good descriptions :)

May 02, 2009 | 2001 Honda VT 600 C Shadow

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