1998 50HP EVINRUDE SPL IDLES ON WATER MUFFS BUT NOT ON THE WATER

[sgtcuh60]

IDLES @ 850RPM IN Neutral,Fwd idle,Rev idle on water muffs but when i put in the in the water it drops to 500rpm's and then stalls I have replaced the all Zip Ties on the fuel manifold and inlet lines with stainless steel hose clamps replaced the fuel line and bulb from the tank. Inspected fuel tank check valve and screen. <br />It all started when I had replaced the bulb on the fuel line the bulb collapsed thats when all my problems began since then I can't seem to get it fixed."Runs Great anywhereabove Idle WOT or just above Idle Reverse" Not Much Time left till I'll be back In Iraq anybody have any Ideas?

 

[Silvertip]

Re: 1998 50HP EVINRUDE SPL IDLES ON WATER MUFFS BUT NOT ON THE WATER

Idle mixture and idle speed need to be adjusted with the engine in the water. Using muffs, there is no exhaust back pressure. RPMs will drop significantly in the water. Hence the stalling.

 

[Solittle]

Re: 1998 50HP EVINRUDE SPL IDLES ON WATER MUFFS BUT NOT ON THE WATER

The zip ties will secure the fuel lines nicely if snugged up properly. The SS clamps can pinch the lines and allow air to be sucked in.<br /><br />Did you replace your primer bulb with an OMC or after market? This has come up quite a few times and for some reason only the OMCs consistently work well.

 

[Rabbitdawghunter]

Re: 1998 50HP EVINRUDE SPL IDLES ON WATER MUFFS BUT NOT ON THE WATER

The idle speed is controlled by advancing the timing. There is a screw on the throttle tower that will only move the linkage connected to the tower. Moving this screw will move the tower off the idle stop and when you look up at the top you can see the linkage moving the timer base. The timer base basically just repositions the trigger coils thereby advancing the timing. Do not adjust the screw at the top of the throttle tower because that one is the wide open throttle stop, if you overadvance the timing by moving that screw, detonation can occur and will damage your engine. You also need to check to be sure that your throttle plates are closing completely at idle and that they start to move together. Last take the remote control to wide open and make sure that the throttle plates open completely. Thanks for your service to our country and may God protect you when you go back!

 

[sgtcuh60]

Re: 1998 50HP EVINRUDE SPL IDLES ON WATER MUFFS BUT NOT ON THE WATER

How could it be the ide screw, when before the ball collapsed it was running great? I'll give it a try though,What's the proper procedure for adjusting twin carbs is there a vacume gage needed like if your settin twin carbs for a motorcycle? Should I turn 1/4 turn out or in? I don't have the Repair Manual. What Would be the right Idle speed out of the water a good bit higher I suspect, "2000rpms 1500rpms"? <br />Thanks for the suggestions!

 

[sgtcuh60]

Re: 1998 50HP EVINRUDE SPL IDLES ON WATER MUFFS BUT NOT ON THE WATER

We use SS Clamps on Blackhawks in the Army Iknow they work Well and yes the plates are closed completely as well at wot. Ihad put a seasense bulb that i bought at wallmart I changed that out with a whole new fuel line sys made for Evinrude/Johnson I don't think it's that but I'll Keep it in mine Thanks

 

[fireman57]

Re: 1998 50HP EVINRUDE SPL IDLES ON WATER MUFFS BUT NOT ON THE WATER

If your bulb collapsed then you need to make sure that your tank is vented.

 

[sgtcuh60]

Re: 1998 50HP EVINRUDE SPL IDLES ON WATER MUFFS BUT NOT ON THE WATER

Hey UPINSMOKE It worked I simulated Being in the water by putting the Motor in a seventy five gallon Trash can full of water sure enough it stalled i went 1/4 turn out but that stalled it so then iwent 1/4 turn in pass the original start point It's running good. Now for the test this weekend.<br />Next Problem does anybody know how to get a <br />50 hp evinrude out of a seventyfive gallon trash can full of water cause I sure can't move the can<br />Thanks for the tip Upinsmoke!!

 

[ryan04]

Re: 1998 50HP EVINRUDE SPL IDLES ON WATER MUFFS BUT NOT ON THE WATER

Drill a hole in the bottom of the can, or use a portable bildge pump. Good luck stay safe.

 

[fireman57]

Re: 1998 50HP EVINRUDE SPL IDLES ON WATER MUFFS BUT NOT ON THE WATER

Put a length of garden hose in it and siphon most of it out. Should be able to tilt the engine and then tip over the trash can to get the rest out.

 

[sgtcuh60]

Re: 1998 50HP EVINRUDE SPL IDLES ON WATER MUFFS BUT NOT ON THE WATER

Yes I know, that's just what I was doing, It was just a joke. YeeHaa back to the Lake With My Wife The Dog & an Engine That Idles As Advertised!<br /> Good thing there are people with outboard engine knowledge and this Iboats Forum cause I'm sure that would have cost me a least $150.00 To fix Thanks Again You'all! "Upinsmoke"

 

[Silvertip]

Re: 1998 50HP EVINRUDE SPL IDLES ON WATER MUFFS BUT NOT ON THE WATER

Glad it worked for you. I like to adjust idle speed and mixture at the dock, in neutral, and when you think its correct, pop it in forward (making sure the boat is secured to dock and the dock is secured to land), and then do a final tweak.

 

[Basscat 1]

Re: 1998 50HP EVINRUDE SPL IDLES ON WATER MUFFS BUT NOT ON THE WATER

The SS clamps can pinch the lines and allow air to be sucked in.<br />

I never could figure out how air could get in, but fuel (liquid) couldnt get out?