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Stubborn Johnson 140hp

wynand_n

New member
"Hi, Im a new guy on the block

"Hi, Im a new guy on the block and for quite awhile followed advice dished out by members and in doing so got a gremlin sorted out in one of my outboards.

However, my sea fishing boat with a 1982 Johnson 140hp outboard fitted was stored for the last five years and recently tried to get it back working again now that I have more time for fishing.
As a precautionary fix I replaced the four spark plugs and she refused to start. When I drained the carbs, the fuel that came out was as dark as oil and that prompted me to remove and clean the carbs, blow out all the jets and holes etc. Starting her up she runs fine on fast idle but a bit off beat on idle. In gear she rev immediately like a banshee when given stick.

But, when launched the weekend, she started at the touch of the button, rev up nicely in neutral, but when put in gear, she dies as soon as the accelerator is moved forward after a slight pickup in revs. After starting her up again with the engine cover removed and a squirt of quickstart into the carb air cover when put in gear, she would stutter and then all hell break loose as she picks up revs and goes like clappers.

Funny thing though, as soon as I put the engine cover back, she refuses to start or run. Had to spent the weekend with an open engine...
Another thing, after she had run and switched off for a few hours, she is hard to start. The little fuel solenoid thing clicks when the key is pressed and in fact, as she stutters when the throttle is opened, the engine actually "kicked in" when the key is pressed a few times.

What can be wrong with the Johnston? It did run fine before going into storage. Any help or suggestions much appreciated.

Wynand
Sunny South Africa"
 
"make sure your timer base,and

"make sure your timer base,and linkages are moving appropriately.
ck compression
if it picks up,when u choke it,it is starving for fuel...u prob still have dirty/clogged jet prob's.."
 
"Thanks jwbmarine,
I will che


"Thanks jwbmarine,
I will check that out. What I did not mentioned, sometimes when you put it in gear and accelerate, she will behave normally, and at other times just bogs down when opening the throttle.

Still, why would she refuse to start or run with the engine cover fitted and goes like hell without it when I get her on power? Ventilation port is open on the cowling."
 
"ck your spark plug boots...a

"ck your spark plug boots...a common prob is,the metal bracket,on the cowl,rubs on plug boot,and w/cover on,..kills 1-2 cyls....been trapped on this before..solution,repl boots,...and this will normall be the bottom ones."
 
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