Lines from primer to carbs, Johnson,87,70hp,not in manual??

[fisherman34]

Can anyone tell me where the lines go on a Johnson, 70 h.p. 87 from
the primer to the 3 carbs. I purchased an original service manual ,but
nothing was listed. The primer solenoid has 3 liines, one is a larger line
the same as goes to each carb. The other two are smaller and connect
to the 3 carbs. Does it make a difference between these two ports, are
they dedicated to go to specific carbs.

 

[tashasdaddy]

Re: Lines from primer to carbs, Johnson,87,70hp,not in manual??

there should be a "T" in the fuel line from the fuel pump, one goes to carbs, the other to the large fitting on the solenoid. the small lines are not dedicated, as the all pressurize at the same time. i would think that there would be 3 lines, one to each carb. not 100% familar with your carb set up. may just 2 prime.

 

[Dhadley]

Re: Lines from primer to carbs, Johnson,87,70hp,not in manual??

The 2 small lines are to the carbs. One has a T in it to split so it feeds 2 cylinders. The other line goes dirctly from the solenoid to the fitting.

 

[fisherman34]

Re: Lines from primer to carbs, Johnson,87,70hp,not in manual??

one of the small lines goes to two carbs with a T fitting, the other line goes to one carb. I tried one line to bottom carb, and one line with a T to the
middle then the top carb. This did not seem to work? I got a very high speed idle. I was considering running one line with T to bottom and middle carb,
then one line to top carb next. appreciate any thoughts.

 

[Dhadley]

Re: Lines from primer to carbs, Johnson,87,70hp,not in manual??

It makes no difference which line goes to which carb. No gas will flow unless you turn the manual release or push the key in. As long as all the lines are plugged in on both ends and there are no breaks the motor cannot suck air either.