1987 Evinrude 150 V6 problems

[EGaskamp]

Hey guys, I have a 1987 Evinrude 150 V6 on the back of a 17' Trophy bass boat. Latley the thing has been bucking and acting up. It only does this sometimes though, and randomly too. It makes me think the carbs really ain't that messed up, otherwise it would do it all the time. I noticed that if I have it running on the hose and I take the cowl off the engine, it seems to run a lot better. I'm a big time boat person. I don't know if any of yall are too, but I'd figure I'd post it. Do y'all have any ideas? Thanks



Eric

 

[TORQUE THIS]

UP here in the NE, this was a huge problem this past season. It's the new fuel being used and it cleans out the fuel system. Carbs, and fuel tanks, or both need to be cleaned out.

That's my guess...

I can't wait for spring!

 

[EGaskamp]

Oh, so you mean the new fuel dislodges all of the dirt and tries to send it through the carbs, therefore clogging it up? That makes sense. Thanks for the reply. I can't wait to get back on the water! Largemouth bass, watch out!!!!

 

[B.G. Smith]

Could be picking up a little water too, might try a little gas treatment. It's strange that it would run better with the cowl off, make sure something hasn't restricted the air flow into the cowl. bg

 

[JKinney]

Purchase a can of omc engine tuner, if you can still find it. Some can be installed through the shrader valve on the choke selenoide if there is one installed. With the engine running disconnect the fuel supply line to the carbs and squirt this stuff in, try to do this for a minute of so, try to keep the engine running. You want this stuff to fill the bowles etc. shut her down and let it set for thirty minutes, take her out and run her. If that dont work you need to tear the carbs down. Good luck. jon Kinney, 24 year coastie

 

[jdooner]

http://forums.iboats.com/?ubb=search

You might try looking here, they have a lot of information. You'll have to join but it's no biggie.

 

[Hoefler]

Check the color of the gasket between the bowl and the main body of the carburetor. If it is black, it has the old style gaskets, if they are tan they are the new ones. If the carbs have not been gone through since 1998, they should be done. In 1998 we were switched over to Reformulated Gas. In a nutshell, it will eat the old gaskets , seals, fuel lines, VRO, etc. . To check your fuel lines, rub some gas on the lines, if they turn your hand black, they should be replaced ASAP. Chances are the inside is gone. I have cut fuel lines open length wise and found nothing but cord. But if it is bucking like the key is turned off and back on, most likely it is electrical. Power pack, stator, timer base, coil, sensor coil, power coil, rectifier regulator, to name a few. Any ways, I am a OMC Master tech and have been factory trained on those models. If you would like more detail, PM me with A number and I will give you a call.

 

[EGaskamp]

Check the color of the gasket between the bowl and the main body of the carburetor. If it is black, it has the old style gaskets, if they are tan they are the new ones. If the carbs have not been gone through since 1998, they should be done. In 1998 we were switched over to Reformulated Gas. In a nutshell, it will eat the old gaskets , seals, fuel lines, VRO, etc. . To check your fuel lines, rub some gas on the lines, if they turn your hand black, they should be replaced ASAP. Chances are the inside is gone. I have cut fuel lines open length wise and found nothing but cord. But if it is bucking like the key is turned off and back on, most likely it is electrical. Power pack, stator, timer base, coil, sensor coil, power coil, rectifier regulator, to name a few. Any ways, I am a OMC Master tech and have been factory trained on those models. If you would like more detail, PM me with A number and I will give you a call.

Hoefler, you have a PM. Thanks for the replies guys. If you think of anything else, let me know. Thanks again!



Eric