Help Diagnosing fuel probs

[raven1978]

Hey guys, once again im looking for insight into this. A couple weeks ago i had a prob with carbs flooding, so i did a carb rebuild, and set floats level. Now it seems to idle & troll much better, BUT i now have a different problem with what seems like having no fuel in the carbs when i go to launch. For towing i tilt the motor up and lock it in place then when i get to the launch i set it in the water and tilt down enuff to get the water intakes wet. Press bulb till firm, turn key, press in to choke for a 5 or 6 count then turn it over. At this point i have to go back and press the bulb again till it gets firm yet again(this is why i believe i have a no fuel prob in the carbs). After repeating this process for, i dunno 3 or 4 times it will eventually start. I have done compression test (148 in each cyl), i have good spark, but the one thing i do NOT have is a venting gas cap. Not sure if this makes a whole huge difference or not with this current problem. Its getting rather embarrassing when i go to the launch and it takes me like 5 - 7 minutes to get my motor running & there's usually 10 people at this boat launch. Once it has ran/ been run i usually have no probs the rest of the day, it's only after it has been removed from the water and sat. I am wondering if there is supposed to be a check valve between the portable gas tank and the fuel pump? Or maybe that's what the bulbs purpose is, to act as a one way valve. Would replacing the primer bulb fix this long starting process? I am fairly new to the boating community so please forgive if this is a dumb a** question. Any and all help is greatly appreciated and you guys rock.

BTW motor is an E50tlccs Evinrude 50 hp VRO disconnected

peAce and FISH ON.

 

[ezeke]

Re: Help Diagnosing fuel probs

Pressing the key in should open the valve on the primer solenoid and allow the fuel that you have pressurized with the primer bulb to bypass the carburetors and go directly to the intake manifold. If the primer solenoid valve is not working, the primer solenoid will do nothing.

Pushing the key in before cranking is not very effective; you should try pushing the key in while cranking as instructed in your manual. Please click the thumbnail.

 

[wilde1j]

Re: Help Diagnosing fuel probs

Do you hold the choke in while cranking? Do that until the motor fires, then release the choke.

 

[raven1978]

Re: Help Diagnosing fuel probs

Sorry my bad, Yes i do hold the choke in while cranking/turning the motor over. I can hear the solenoid clicking when i press it in / activate it. I had no problems starting it before the carbs were flooding but now it seems like they or the intake manifold may be dry. There are NO fuel leaks anywhere, vacuum hose is attached to air intake, all lines are in good condition. I dunno where else to look lol im stumped. I mean it eventually fires up, but not like it did b4. It would fire before on about the 3rd or 4th rev. Again thanx for all input into this guys.

 

[raven1978]

Re: Help Diagnosing fuel probs

Quick update on this issue.....i started having this problem when i put my motor up and locked it into place (about 45 - 50 degree angle) for towing. I tried something on a whim, while towing now i tilt the motor up a few degrees (enuff to clear ground when going over bumps) while towing, and now it starts up without any problems what soever. This seems odd to me but maybe someone out there could shed some light on why this would make a difference. If i tow with motor up & locked, takes forever to start...if i tow with motor down, fires right up as it should. Any insight is appreciated, and thanx for all the help in the forum

 

[jonesg]

Re: Help Diagnosing fuel probs

tilting can cause the bowls to empty, then you might get sticky floats or maybe the fuel bulb isn't filling them up properly.

Whatever it is, tilting for travel shouldn't cause a problem if you pump the bulb firm before trying to start.

 

[ezeke]

Re: Help Diagnosing fuel probs

According to experts who worked for OMC and many others, the motors were never designed to work properly while tilted beyond the trim range.

http://forums.iboats.com/showthread.php?t=183060&highlight=designed+tilted