Johnson 130 flooding out

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bayhunter

Cadet
Joined
Dec 11, 2004
Messages
6
When starting my 1998 Johnson Outboard it floods out as indicated by white smoke exhaust/wet spark plugs. If i wait awhile and do not choke it then it will start. When warmed up it starts O.K. but I noticed some while smoke from the exhaust like its burning rich. I pulled all the carb floats and cleaned and checked but still does the same thing. Compression is all even at about 125. What else could it be?
 
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bayhunter

Cadet
Joined
Dec 11, 2004
Messages
6
Re: Johnson 130 flooding out

thanks, I have tried the search function and have found other info that may be useful. I will be trying to find a manual today so I can understand a little more about the engine and continue troubleshooting. I will post what I find out or what the dealer finds out if I have to take it to them.
 
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bayhunter

Cadet
Joined
Dec 11, 2004
Messages
6
Re: Johnson 130 flooding out

O.K I have changed the plugs, changed the water pump and both thermostats including pulling the heads to ensure no problems with water flow around the cylinders. Looks like I had one thermostat stuck that caused a little steam. Cylinders looked good. Tested today and engine runs fine but heads run cool about 80 degrees on a hose as sensed by my wifes cooking themometers ( she will never know) . Should the temp be a little higher (thermostats set at 143) and at these temperatures won't this eventually damage my cylinders?
 
OBJ

OBJ

Supreme Mariner
Joined
Dec 27, 2002
Messages
10,161
Re: Johnson 130 flooding out

Give it the ol' touch test bayhunter. Let it idle on the muffs until it warms up. Notice on top right in front of the heads a flat place. Put your fingers there. If you can hold them there for several seconds before having to remove them, that's about right. You'll know if it's to hot or to cold. I know the test sounds archaic....but it works.<br /><br />EDIT: And the port side cylinder bank will tend to run a little warmer than the starboard side.
 
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bayhunter

Cadet
Joined
Dec 11, 2004
Messages
6
Re: Johnson 130 flooding out

Thanks, I have had my hands all over the heads and I can leave them there forever. Hard to describe but it seems that installation of the vernatherm type thermostat may have something to do with it. After the original failure I thought one side was too hot after replacing the thermostat but I think the problem was that one side was too cold. After swapping thermostats and finally replacing both with new it seems that both sides are running cool. I will disassemble both and continue to play with each until I figure it out. Thanks for the info.
 
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Frank I.

Seaman Apprentice
Joined
Nov 13, 2004
Messages
32
Re: Johnson 130 flooding out

I also have a johnson 130 and have had the same problem of running cold,after months of going nuts and getting a johnson rep (tech)to talk the problem was simple to fix.First make sure there are no tiny punctures in the rubber diaphrams,even the smallest will cause that bank to run cold,then take out the large springs and stretch them a little by hand but dont make a slinky out of them.You may have a little to much backpressure causing the diaphram to lift off the vernatherm at idle causing cool running.Sounds nuts,but thats straight from Bombadier service techs and it worked for me.I would like to know just what causes the excessive backpressure at idle though?
 
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bayhunter

Cadet
Joined
Dec 11, 2004
Messages
6
Re: Johnson 130 flooding out

Thanks for the info. I changed all components to new including the rubber diaphrams. I compared the old to new springs and as you said the old springs were slightly shorter thus not applying as much pressure. This fixed the problem and now both sides are running up to temperature. Happy new year and thanks for your help.
 
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