1977 140 johnson

[sjkford]

"Hey people, I've been lea

"Hey people, I've been learning a lot from this site by reading other posts. Now I have a question myself. After doing a de-carb on my '77 140 it seems to be smoking(blue) much more than before. There seems to be an awful lot of oil on the l77JC4 plugs, also. I haven't run it very hard since the de-carb on the water. Could it be that I just need to do this? The motor runs smoother and has plenty of power. It runs at about 5100rpm at full throttle and it is on an 18' Invader ski boat(1986) with a 13.25x19 prop. Thanks in advance for any assistance."

 

[jwbmarine]

"chg,the plugs after a de-carb

"chg,the plugs after a de-carb--inst QL77JC4,gap at .030 and run the hell out of it....it'll quit that over smoking."

 

[sjkford]

"Wow, that was a quick respons

"Wow, that was a quick response! Many thanks! I will try this after work tomorrow."

 

[sjkford]

"jwb, I took the boat out toda

"jwb, I took the boat out today and ran at WOT for several minutes. I then installed the QL77JC4 plugs and tried it again. Now I can turn the idle speed down to spec. without stalling and I gained 200 rpm at WOT(5300). Thanks for the guidance."

 

[joereeves]

"Well JWB, Ya finally fixed on

"Well JWB, Ya finally fixed one (grin)."

 

[david_r]

this de-carb is it something t

this de-carb is it something to run through the gas to knock out the carbonization on heads and pistons or are yall talkin bout a tear down? thanks for the help.

 

[sjkford]

Seafoam spray can sprayed into

Seafoam spray can sprayed into carb throats and spark plug holes. No teardown necessary.Directions on can.

 

[david_r]

"will do, thanks for the help!

"will do, thanks for the help!"