Upgrading motor question

[Stump bumper]

I am playing with the idea of upgrading my 2004 115hp Merc to a 2016 4 stroke 115hp. I don't need a new boat just tired of carbs and smoke and plugs fouling and such. Has anyone done this locally? What would be the trade in on an old 2004 beat up 115? Any point of contact or advice appreciated though I am not wanting a new boat or trade for someone else's problem. This is too go on a 2004 700 Nitro wondering what the weight difference is?

[rps]

Come to the dark side: Evinrude ETEC with two stroke torque and a 300 hour maintenance cycle. Much lighter than a 4 stroke/every year maintenance beast.

[snagged in outlet 3]

Come to the dark side: Evinrude ETEC

I thought they were white?

[fishinwrench]

 

I am playing with the idea of upgrading my 2004 115hp Merc to a 2016 4 stroke 115hp. I don't need a new boat just tired of carbs and smoke and plugs fouling.

Ya know what a vapor separator is?  It's a carburetor minus the only part of a carburetor that never EVER fails (the Venturi), so you're not escaping a carburetor.  

The spark plugs for the 2016 4S are 23.00 apiece. Just so ya know....future plug swaps on that one are gonna burn a Benjamin.

The The inline 4 cylinder 2S 115 Merc was/is a bizarre piece of engineering.  If set up properly they do fine, but they are fickle if the person "tuning" them is not on the correct level.  Fouling plugs is certainly not a common problem.....just the opposite is true, as running too lean is the obstacle to overcome.  If you are truly fouling plugs then the oil pump linkage rod has either fallen off or is WAY out of sync. Which would also explain the excessive smoke.

[Seth]

 

Come to the dark side: Evinrude ETEC

I thought they were white?

 

If you get a G2, you can get all sorts of colors! Mine is a gen1 and navy, so it's kind of dark, but not as dark as a Mercury. 

[Stump bumper]

 

Ya know what a vapor separator is?  It's a carburetor minus the only part of a carburetor that never EVER fails (the Venturi), so you're not escaping a carburetor.  

The spark plugs for the 2016 4S are 23.00 apiece. Just so ya know....future plug swaps on that one are gonna burn a Benjamin.

The The inline 4 cylinder 2S 115 Merc was/is a bizarre piece of engineering.  If set up properly they do fine, but they are fickle if the person "tuning" them is not on the correct level.  Fouling plugs is certainly not a common problem.....just the opposite is true, as running too lean is the obstacle to overcome.  If you are truly fouling plugs then the oil pump linkage rod has either fallen off or is WAY out of sync. 

I understand what you are saying Fisnwrench, it is just the same thing every year. I have tried every mechanic around same old thing, they clean the carbs tell me what a bad job the last guy did and talk about how bad the plugs were even if I take it in with new plugs. Then it idols fine, comes off the trailer great, always has then I run out 10 to 15 miles, fish for a while and it is start up and jam into gear before it dies. I am so tired of sinking $800 a year into carb rebuilds and it never runs any different. I am also tired of paying $75-$85 for people to throw away my new plugs that are $4.25 at O'reileys.

[Blll]

Stump I've had a Merc for 15 years  and I'm just tried of their penchant for hard cold starting. But I think the smallest G2 is still a 150hp so you may not have that option to consider. If I repower, I'm sure going to look at the G2 before going 4 stroke. JMO 

[fishinwrench]

Yeah it starts and idles fine because when you pump the primer bulb you fill the carbs with fuel..and no oil, then you run awhile and the out of sync oil pump fills the carbs with an overly oil-rich mixture.  So the next time you fire her up you are trying to run it on diesel fuel.

 There's a linkage rod going from the carb linkage to the oil injection pump, look at it....I bet it has fallen off, or wasn't put back on after the carb rebuild.  If it is attached then look to see if the easy to see marks on the oil pump cam are lined up when the throttle is in the closed (neutral) position.  If not adjust so they are.

Just saying, that could be the source of ALL of your problems. 

And just for future reference, fouled plugs don't have to be replaced....just clean them, check the gap, and put them back in.

[Ketchup]

 

 

And just for future reference, fouled plugs don't have to be replaced....just clean them, check the gap, and put them back in.

My dad told me those words 30 years ago. Still do it with all my small engines. 

[Stump bumper]

 

Yeah it starts and idles fine because when you pump the primer bulb you fill the carbs with fuel..and no oil, then you run awhile and the out of sync oil pump fills the carbs with an overly oil-rich mixture.  So the next time you fire her up you are trying to run it on diesel fuel.

 There's a linkage rod going from the carb linkage to the oil injection pump, look at it....I bet it has fallen off, or wasn't put back on after the carb rebuild.  If it is attached then look to see if the easy to see marks on the oil pump cam are lined up when the throttle is in the closed (neutral) position.  If not adjust so they are.

Just saying, that could be the source of ALL of your problems. 

And just for future reference, fouled plugs don't have to be replaced....just clean them, check the gap, and put them back in.

I know exactly what rod you are talking about, I will check. Thanks