Hard Start Evinrude 120

[rustyscrew]

Engine: Evinrude 120
1993 or 1994
4 Cylinder

I have been having trouble with this engine starting recently. It has slowly gotten worse. It is not the starting system, compression is fine, I just cleaned all 4 carbuerators....

When I start it it jumps to but spews a ton of smoke, it runs rough, skipping a cylinder occasionally and then just loses power and dies out. I did this routine for about a half hour this morning until it finally caught. I could hear the engine finally switch modes (temperature thing?) and then it ran great.....Clean (for that engine) and smooth and I didn't have any trouble the rest of the day.

I had similar trouble before I cleaned the carbs about a month ago..then it ran great. Can they be dirty already? I put a new fuel filter on when I cleaned the carbs.

So the real question for me is...Why does it run so bad at first, then fine? What is different when it is cold?

thanks,
rusty

 

[Bifflefan]

Re: Hard Start Evinrude 120

How long since the plugs were changed?
And by cleaned the carbs, what does that entail exactly? Rebuilt?

 

[rustyscrew]

Re: Hard Start Evinrude 120

Plugs are all brand new. And I rebuilt all the carbs...cleaned but I didn't have the kit, so I used to old stuff. It ran really well for one or two trips after the "rebuild". I have new kits on order. So will do it again.


"why don't we have time to do it right the first time, but always have time to fix it?"

rusty

 

[david_r]

Re: Hard Start Evinrude 120

is it only when the eng is cold you have problems?

are you pushing in on the key?....... you wouldnt believe how often that is overlooked.

 

[rustyscrew]

Re: Hard Start Evinrude 120

Yes only rough when cold, as soon as it clicks over to the warm mode (rpms drop) and it runs great. I do push in the key when starting cold.


I ran again the next day and it started easily.... still a bit of a dirty start. Although it has always been a bit dirty. I have 4 carb kits on order from iboats. When I get a chance I will redo the carbs again and see.

 

[bktheking]

Re: Hard Start Evinrude 120

I have to push the primer on my boat like 8 times before it will run right, I just live with it. Have you tried pushing the primer in until it stabilizes?

 

[k9hunter]

Re: Hard Start Evinrude 120

not trying to jump in on your post but i am having the same problems. 1994 120 pretty much the exact same symptoms but mine doesn't want to idle for more then 5 mins. i created a post and for the most part sounds like carbs need complete rebuilding. I do have some additional questions/ concerns. i was told it could be the power pack starting to go and not sending power to a particular coil so no fire or not a good spark. just wondering what if this could be the case?

 

[Faztbullet]

Re: Hard Start Evinrude 120

With engine " spewing tons of smoke" and hard starting I would look for a flooding problem. You may have a carb/s flooding and making it hard to start or a VRO pump with bad internal diaphram flooding crankcase after last use. Pull the pulse line to VRO and see it if has fuel in it ,if so VRO is bad.

 

[bktheking]

Re: Hard Start Evinrude 120

Spewing tonnes of smoke is open to interpretation, a post a month ago from the same claim of a guy running in a barrel was normal 2 stroke behavior, we were expecting to see James Bond smoke screen but saw healthy 2 stroke 50:1 smoke. Start with kits and get back to us.