Johnson 150 outboard stuttering

[Newguy on water]

Hey everyone new to this post, hoping someone can help me out with a problem I’ve been having. I have a 1998 Johnson 150 fast strike, I’ve been having a problem with the engine running like it should. Before it would give me some problems starting up, and then when it would start up run fine all the way across the lake, but as soon as I hook the tube up and try to go it would bog down and shut off.. I rebuilt the carburetors, replaced the primer bulb, and fuel filter, and now it starts a little easier, still idles very rough ( almost acts like it s choking itself out) but once I can get it to open up it runs excellent.. I’ve looked at different forums and seen it could possibly be the primer solenoid? I’m new to the boating world and learning as I go, any suggestions on what it could be I would appreciate it..

 

[racerone]

The red lever on the solenoid should be in line with the primer valve body.-----That primer valve opens when you push the key in to put fuel into the motor for start up.----It does nothing when motor is running.----Do a compression test.----Were the carburetor bowls warped ?

 

[Newguy on water]

So should I keep the primer valve open to see if that helps it out? The bowls didn’t seem warped to me, but that could be a possibility. If they were warped would it cause the symptoms I’m having

 

[w2much]

Hope you got the carbs right on the rebuild. Did you adjust them at idle in gear under load? You need to in order to get the idle correct. The carbs bowls if warped will let air in and may leak fuel. Check them on a flat piece of glass or with a straight edge. Once the engine is running unhook fuel line to primer close off each end. be careful not to spray fuel all over. As racerone says do a compression test before moving on.