|
Forums59
Topics1,057,668
Posts14,288,637
Members144,611
| |
Most Online39,925
Dec 30th, 2023
|
|
 Johnson carbs tunig info
#2089087
03/19/08 11:18 PM
|
Joined: Aug 2005
Posts: 163
roostertail
OP
Outdoorsman
|
|
OP
Outdoorsman
Joined: Aug 2005
Posts: 163 |
I have great compression ,new plugs,new reeds,new fuel lines off the tree and so forth.Got started today but wont idle or stay running more than 30 seconds the first time then worst and so on.
I have two srew plugs on both sides of the carbs,but the manual only shows one plug on each side. How do I tune these carbs?
I break for Bass
|
|
|
Re: Johnson carbs tunig info
[Re: roostertail]
#2089849
03/20/08 02:37 AM
|
Joined: Dec 2003
Posts: 3,180
2-stroke
TFF Team Angler
|
|
TFF Team Angler
Joined: Dec 2003
Posts: 3,180 |
What year and horsepower? step-by-step, carb needle valve adjustments: http://forums.iboats.com/showthread.php?t=167352Fuel line holding pressure? Tank vent clear? When it shuts down...are the carb bowls full or empty? Sounds kinda like improperly set floats.
|
|
|
Re: Johnson carbs tunig info
[Re: 2-stroke]
#2091674
03/20/08 06:11 PM
|
Joined: Aug 2005
Posts: 163
roostertail
OP
Outdoorsman
|
|
OP
Outdoorsman
Joined: Aug 2005
Posts: 163 |
1983 I think V4 115
yes and yes.Maybe fuel pump kit?
I break for Bass
|
|
|
Re: Johnson carbs tunig info
[Re: 2-stroke]
#2091678
03/20/08 06:12 PM
|
Joined: Aug 2005
Posts: 163
roostertail
OP
Outdoorsman
|
|
OP
Outdoorsman
Joined: Aug 2005
Posts: 163 |
1983 I think V4 115
yes and yes.Maybe fuel pump kit?
I break for Bass
|
|
|
Re: Johnson carbs tunig info
[Re: roostertail]
#2091854
03/20/08 07:17 PM
|
Joined: Dec 2003
Posts: 3,180
2-stroke
TFF Team Angler
|
|
TFF Team Angler
Joined: Dec 2003
Posts: 3,180 |
With a weak fuel pump you usually see the line lose pressure. But 30 seconds is about enough time for it to burn up the gas that you pumped into the carbs when you primed the line. If the float valves are set too high, or stick shut, it can starve for gas without the bulb going soft. Generally if the pump needs rebuilding, you can keep it running by pumping the primer bulb when it starts to sputter. If pumping the bulb has no effect, then the pump is most likely good.
Ok, I believe that motor has fixed jets, no adjustments needed. Four screw plugs total, one upper and one lower for each side, right?
Have you had any work done on it recently?
|
|
|
Re: Johnson carbs tunig info
[Re: 2-stroke]
#2092556
03/20/08 11:23 PM
|
Joined: Aug 2005
Posts: 163
roostertail
OP
Outdoorsman
|
|
OP
Outdoorsman
Joined: Aug 2005
Posts: 163 |
yes ,I pulled the carbs and had someone look at them and they came back with a clean bill of sale.
I break for Bass
|
|
|
Re: Johnson carbs tunig info
[Re: roostertail]
#2092568
03/20/08 11:26 PM
|
Joined: Aug 2005
Posts: 163
roostertail
OP
Outdoorsman
|
|
OP
Outdoorsman
Joined: Aug 2005
Posts: 163 |
yes i reAD IN THE MANUAL ABOUT SETTING THE FLOATS BUT I assumed all was checked out. I will ask him what he did if anything to make sure the floats are set right.
I break for Bass
|
|
|
Re: Johnson carbs tunig info
[Re: roostertail]
#2093515
03/21/08 10:24 AM
|
Joined: May 2003
Posts: 11,586
gary purdy
TFF Guru
|
|
TFF Guru
Joined: May 2003
Posts: 11,586 |
Looked at them? Check to see if all 4 are firing and if they are Get 2 carb kits and make shure the carbs are clean and blow out every hole you can find. Clean and install a fuel pump kit while your at it. Reassemble to specs
The world will not be destroyed by those who do evil, but by those who watch them without doing anything. Remember what He has done and remember that He is not done yet!-- GOD IS GOOD
|
|
Moderated by banker-always fishing, chickenman, Derek 🐝, Duck_Hunter, Fish Killer, J-2, Jacob, Jons3825, JustWingem, Nocona Brian, Toon-Troller, Uncle Zeek, Weekender1
|
