Carb rebuild/adjustment

DumbBass

Cadet
Joined
Jan 26, 2003
Messages
21
Hello! I've owned my boat and motor about 16 months; motor is '89 Johnson J60ELC 60HP w/VRO disabled. Local dealer did 12 month service last winter; motor checked out fine (good compression, etc.) I will begin doing maintenance/service myself. Only problem during this time is I had to increase idle RPM to 820-850 or motor would run rough and cut off at 700-750 RPM as recommended in service manual. I suspect "rich" mixture because of occasional raw/unburned oil/gas under cowl and on GC and dark sooty stains under upper exhaust ports below cowl. I plan to rebuild carbs because of above problem and also unknown prior maintenance of motor. Would anyone recommend a diffent approach based on above info? Try adjusting idle mixture?<br />I have some questions about rebuild.<br />1) Are the fuel line "clamps" just wire ties or do I need "factory" type ties?<br />2) Can I use regular "LocTite" instead of factory "ScrewLoc"?<br />3) Any advantage to OMC/Bomb. rebuild kit vs. online kit?<br />4) Is there any danger in trying to adjust idle mixture leaner if carb rebuild doesn't solve problem. <br />5) I read on another site about an OMC Service Bulletin recommending changing the size of the main jets. How can I find out about any other Service Bulletins which may apply to this motor?<br /><br />I really enjoy this website. I have been "lurking" in the background for a number of months. The information and help provided by the "regulars" here is amazing! I don’t' know very much, but I know alot more than I did! Thanks in advance...Tolstoy out :D
 

clanton

Rear Admiral
Joined
Jul 9, 2001
Messages
4,876
Re: Carb rebuild/adjustment

1. Use OMC tie wrap, or good quality tie wrap.<br />2. The factory screwloc is Loctite blue.<br />3. Use the OMC kit.<br />4. No.<br />5. The service bulletin you speak of does not apply to this engine.<br />6. I would run a can of OMC engine tuner thru the engine.
 

shelbydriver

Petty Officer 2nd Class
Joined
Dec 13, 2002
Messages
173
Re: Carb rebuild/adjustment

I used a quicksilver kit and noticed the main jets were bigger? Maybe it's a good thing? Mine is running pig rich though. I'm gonna adjust the floats again. 88 johnson 175
 

OBJ

Supreme Mariner
Joined
Dec 27, 2002
Messages
10,161
Re: Carb rebuild/adjustment

I'm with clanton on this. Use the OEM carb kit. I personnally do not like after market carb kits.
 

seahorse5

Rear Admiral
Joined
Jan 24, 2002
Messages
4,698
Re: Carb rebuild/adjustment

For best results use the factory carb kits (#396701) and ty-raps. The part number 320107 ty-rap has a radius on the head of it to help seal around a hose. Regular ty-raps have a square head and "bunch up" the rubber at that point, sometimes causing leaks.
 

Dhadley

Supreme Mariner
Joined
Feb 4, 2001
Messages
16,978
Re: Carb rebuild/adjustment

What spark plugs are you using?<br /><br />Good luck!
 

DumbBass

Cadet
Joined
Jan 26, 2003
Messages
21
Re: Carb rebuild/adjustment

Dhadley, I don't know which plugs I have. I can find out tonite when I return home. I remember they are Champions as recommended by the factory service manual. They may be the suppressor type. Please understand that the motor runs great. My only issue is having to increasing idle to 820-850 RPM to avoid cutting out. I am new to 2 cycle motors and may be expecting to much. Thanks for the help!
 
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