120 Mercruiser 2.5L - No spark

[Mercruiser 120]

Yep starts up right away and I can giver again

 

[Mercruiser 120]

My plugs are black. Looks like the end was in a fireplace. Thin layer of suut

 

[alldodge]

Don't see an issue with running lean
The motor might be dying because the shift interruptor switch is hanging or mis-adjusted. The interruptor makes the distributor miss to allow the clutch in the drive to unload so it can be moved into neutral. If it hangs or not adjusted correctly the motor can die

 

[Mercruiser 120]

Don't see an issue with running lean
The motor might be dying because the shift interruptor switch is hanging or mis-adjusted. The interruptor makes the distributor miss to allow the clutch in the drive to unload so it can be moved into neutral. If it hangs or not adjusted correctly the motor can die

So could I try running it with the shift interrupter wire off my distributor. It will be hard to shift for that ride but at least I will know

 

[Scott Danforth]

you will have to key off to shift from in gear to neutral if you disconnect the shift interupt

 

[Mercruiser 120]

you will have to key off to shift from in gear to neutral if you disconnect the shift interupt

What does key off mean? Sorry. I can’t run it without the shift interrupter?
Also, if there was dirt on my needle and seat valve, would it be acting up like this?
I’m talking to the guy who rebuilt my carb, they are professionals and the guys to go to up in Canada. Some gas came out the vent hole today, above the choke plate…..and when i shut the key off I can go back and see gas dripping onto the throttle plates

 

[Mercruiser 120]

What does key off mean? Sorry. I can’t run it without the shift interrupter?
Also, if there was dirt on my needle and seat valve, would it be acting up like this?
I’m talking to the guy who rebuilt my carb, they are professionals and the guys to go to up in Canada. Some gas came out the vent hole today, above the choke plate…..and when i shut the key off I can go back and see gas dripping onto the throttle plates

 

[Mercruiser 120]

What does key off mean? Sorry. I can’t run it without the shift interrupter?
Also, if there was dirt on my needle and seat valve, would it be acting up like this?
I’m talking to the guy who rebuilt my carb, they are professionals and the guys to go to up in Canada. Some gas came out the vent hole today, above the choke plate…..and when i shut the key off I can go back and see gas dripping onto the throttle plates

 

[alldodge]

With the carb dripping fuel then its shutting down from flooding. For this to happen the float is not set correctly, the float is to heavy and is sinking, a piece or crud got in the needle seat, the needle seat is bad or there is to much fuel pressure

 

[alldodge]

Key OFF
means you have to turn the motor OFF to get the drive out of gear. The Alpha drive clutch must be unloaded to shift into neutral, just the way its made.

 

[Scott Danforth]

What does key off mean? Sorry. I can’t run it without the shift interrupter?

exactly what it states and what AD re-iterates

Key OFF
means you have to turn the motor OFF to get the drive out of gear. The Alpha drive clutch must be unloaded to shift into neutral, just the way its made.

because you have a dog clutch and not a cone clutch, without the shift interrupt you can not get the engine into neutral unless you key off and shift, then key back on to catch the motor.

it not that its hard to shift, it is that it wont shift.

hence, key off to shift.

what the shift interrupt does is kill the ignition so you can shift into neutral.

that is why if your shift interrupt and lower shift cable are not adjusted right, it dies going into and out of gear

 

[Mercruiser 120]

Thank you

With the carb dripping fuel then its shutting down from flooding. For this to happen the float is not set correctly, the float is to heavy and is sinking, a piece or crud got in the needle seat, the needle seat is bad or there is to much fuel pressure

.
The carb guy says to try unhooking the fuel line and running the carb dry. Will that get rid of the piece of crud on the needle or seat

 

[Mercruiser 120]

Thank you

.
The carb guy says to try unhooking the fuel line and running the carb dry. Will that get rid of the piece of crud on the needle or seat

Do you guys know the measurement from the bowl gasket to the float seam for a 2.5L In line 4 on the Rochester 2 jet

 

[alldodge]

Thank you

.
The carb guy says to try unhooking the fuel line and running the carb dry. Will that get rid of the piece of crud on the needle or seat

It might

Do you guys know the measurement from the bowl gasket to the float seam for a 2.5L In line 4 on the Rochester 2 jet

 

[Mercruiser 120]

All Dodge.
Just helping my dad with his outboard. Mariner 8hp on his sailboat.
Ran rough, under powered. Pulled the plugs, top was always wet.
We put a new coil pack(Primary ignition coil) on the top…the cylinder that wasn’t firing.
He put it back on and same problem.
What should I do now. Oh and what Ohm setting do I put my multi-meter to check the secondary winding in the coil. 20, 200, 2K or 20k?

 

[alldodge]

All Dodge.
Just helping my dad with his outboard. Mariner 8hp on his sailboat.
Ran rough, under powered. Pulled the plugs, top was always wet.
We put a new coil pack(Primary ignition coil) on the top…the cylinder that wasn’t firing.
He put it back on and same problem.
What should I do now. Oh and what Ohm setting do I put my multi-meter to check the secondary winding in the coil. 20, 200, 2K or 20k?

I'm not that great with 2 cycle stuff. I would post it in the OB section and look for some of those guys. I would look at what makes the coil fire, magneto, CDI box. I'm rambling because I would have to look up the motor to see how its built

 

[Mercruiser 120]

I'm not that great with 2 cycle stuff. I would post it in the OB section and look for some of those guys. I would look at what makes the coil fire, magneto, CDI box. I'm rambling because I would have to look up the motor to see how its built

Mariner W8 (M) (W / Marathon) Flywheel Magneto Parts

Mariner w8 (m)(w/marathon) flywheel magneto parts. Buy a genuine Mercury Quicksilver or aftermarket part.

www.marineengine.com

I was hoping that would light up blue for you to click

 

[Mercruiser 120]

Mariner W8 (M) (W / Marathon) Flywheel Magneto Parts

Mariner w8 (m)(w/marathon) flywheel magneto parts. Buy a genuine Mercury Quicksilver or aftermarket part.

www.marineengine.com

I was hoping that would light up blue for you to click

So we just replaced the top coil that fires the spark plug. I’m not always down at dads on the water but he says didn’t change anything with new plugs, new coil

 

[alldodge]

Looks like it has 2 main coils and 2 items called coils (item 8) which do the switching when the magnets on the epass by (that's a maybe). At least that's what it looks like

 

[nola mike]

Looks like it has 2 main coils and 2 items called coils (item 8) which do the switching when the magnets on the epass by (that's a maybe). At least that's what it looks like

Item 8 is the coil that supplies power to the ignition system (the function of the battery on an I/o). There is otherwise a completely separate ignition system for each cylinder. 2 sets of points, that's where you need to start. Op, this couldn't possibly be further off topic. Start a new thread in the mercury ob section.