1995 200 HP Johnson Ocean Runner Stalls at Idle

[RHB]

Carburetor #3 fuel spitback at high idle. When idle RPM's reduced motor coughs through #3 and stalls. I have removed the carburetor to clean up. Any advise appreciated.<br /><br />RHB

 

[BKool68]

Re: 1995 200 HP Johnson Ocean Runner Stalls at Idle

I would check for a stuck or broken reed valve on that cylinder.

 

[seahorse5]

Re: 1995 200 HP Johnson Ocean Runner Stalls at Idle

Reed failure is very very rare, but it does happen. Most likely the reed box gasket is dislodged or torn. You have to remove the carbs and the intake manifold to replace it.

 

[RHB]

Re: 1995 200 HP Johnson Ocean Runner Stalls at Idle

Thanks for the replies.<br /><br />My Johnson service manual fuel system trouble check chart lists the leaf plate (Reed Valves?)gasket as most likely cause. Are any special tools required to remove the carbs as an assembly? I seem to recall torx style screw heads.

 

[RHB]

Re: 1995 200 HP Johnson Ocean Runner Stalls at Idle

Thanks seahorse.<br /><br />I pulled the carb, cleaned and rebuilt it. Installed carb same problem.<br /><br />Removed the carb and intake manifold and looked down into the reed box. I can see the gasket has been dislodged. I will replace the gasket and try again. <br /><br />Any suggestions while I have it torn down this far?

 

[clanton]

Re: 1995 200 HP Johnson Ocean Runner Stalls at Idle

I would loctite all of the screws inside the intake, that I removed.

 

[RHB]

Re: 1995 200 HP Johnson Ocean Runner Stalls at Idle

Thanks Clanton I'll do as you advise.<br /><br />Sorry if this has been covered but as I look at the reed box I don't understand what it does and how it does it. What moves and what is the source of energy to move it?

 

[BKool68]

Re: 1995 200 HP Johnson Ocean Runner Stalls at Idle

The reed valves open from the suction created when the piston is moving upward in the cylinder. They are the flat finger shaped pieces on the inside of the intake.

 

[RHB]

Re: 1995 200 HP Johnson Ocean Runner Stalls at Idle

Thanks BK '68 I think I understand how it works.<br /><br />Since I'm waiting on a gasket set from the dealer I spent some time getting a good look at the carb/throttle plate assembly. I removed all 6 carbs as an assembly and wondered why OMC chose to hang the bottom two carbs off those U shaped adjustable links?