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Johnson Stinger 75 Stalling

T

talonx1

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Model 75elr76d, I just recently got this motor from my father in law and have been having trouble keeping it from stalling. The starting lever has to be cranked up to hold close to 2500 rpms to keep it from stalling which is too high for safely shifting into gear i would think. Once in gear and not stalled out it will run quite well so I'm assuming the carbs are probably gunked up. I removed the engine cover to take a look at what I'd be dealing with and noticed a spring that seemed out of place, the end of it wasn't applying pressure to anything so was wondering if anyone knows what it's proper placement might be. I was thinking either position A or B in my attached image but could be completely wrong as I'm not sure what function the spring serves. Also the carb cover has a port labeled "Fog Here", If I'm using a spray carb cleaner can I spray into that port as opposed to removing the cover or is it primarily just for starting sprays? Thanks in advance for any advice.

Steve
 

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You are not the first party to be " confused " by that spring.----Just forget about that spring , as it's purpose is to hold the chokes open at full throttle.----Start your trouble shooting with a compression test.---Follow that with a check to see if you have spark at each cylinder that will jump a gap of 7/16"----------If those are OK then look at cleaning the carburetors PROPERLY , mechanic in a can spray is simply not good enough.--You need to take them apart and verify they are clean.-------Running with blockages in a carburetor can easily damage your motor !!!------Install a new impeller too.
 
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Rgr that on the spring, as for how long it's been sitting I assume at least quite a few months possibly closer to a year. He said he didn't have any trouble stalling when completely lowering the starting lever in the past. Only stalling problem he mentioned having was having the choke switch set on, just said to remember to try hitting it and letting the rpms go back up. Tried that of course, it just stalls out at way too high an rpm.Taking the carbs apart for cleaning should be within my grasp, just thought I'd give a simple carb cleaner a shot before going through the trouble.
 
If I can pick up a simple compression tester what kind of reading should I be looking for?
And thanks for the response btw.
 
Carburetors MUST be taken apart for cleaning.----------The high speed jet that threads into the float bowl MUST be removed for cleaning.---Compression readings should be the same for all 3 cylinders, that is what you want to see !!!
 
If when you take apart the carbs, you find any material that looks like fuel line, replace all the fuel lines and fuel pump.
If that engine has good compression, it may last another 36 years if taken care of properly.
 
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