help?? VRO

[Raz]

Re: help?? VRO

>>> James Thanks for the tip, I'll have that checked...<br /><br />>>> Mic I've tried that, but the primer bulb was always firm... even tried the primer at the switch... which is what led me to believe it was either sucking air or back to an ignition problem such as James suggested..<br /><br /> Thanx again everyone...I'll let you all know, and a special thanx to ob..

 

[Luna Sea]

Re: help?? VRO

Raz,<br /><br />I've had that exact same problem with my 85 120hp Evinrude for over a year now. Done chasing fuel/air. Testing ignition components now. Problem got worse and worse till it didn't run at all. But I had your "3000" rpm top speed for the longest time. Only good news for me is mechanic just took in motor like mine in trade and invited me down to start swapping ignition parts.

 

[Bellboy]

Re: help?? VRO

As you've discovered (the hard way) most carb problems are something else altogether (and usually ignition related).<br /><br />Here's a trick that us auto mechanics try to see if there's a fuel mixture problem: with the engine running we'll try to close the choke butterfly (or put our hand over the top of the carb/throttle body). If the engine picks up speed then we know that the mixture is too lean (closing the choke etc richens up the mixture).<br /><br />This tells us that there may be a vacuum leak somewhere.<br /><br />Conversely, if we induce a vacuum leak (pulling off a vacuum hose somewhere) and the engine speeds up then we know that it's too rich.<br /><br />I don't know if this is possible to do on most outboards, but the principle still applies and hopefully it'll give you a clearer understanding of the relationship of fuel mixtures to how the engine responds.<br />-ANT