Should run all Cylinders but dont

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Jan 17, 2019
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webbd: get a syringe or something like that and suck up some fuel mix and squirt it into the carbs one at a time and see what it does. I know 2 carbs for 4 cyl but might rule out the carbs or reeds? the emulsion tube going into the carbs must be clear... take the starboard plug wires off and switch the primary terminals on the port side, then back again trying to get some sort of fire to port to isolate. squirt some fuel mix down the port cylinders if they fire you know its fuel. just an idea.
 

dave01tx

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Sep 24, 2020
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(This part to Webbd, ive not found what the firing order is so i dont know 1 or 3)

(to ct1762 Ill try that after i get it back together)

Standing at the back of the motor Wires from the Power Pack go as follows.

Right top Org and blue Right bottom Org and green
Left top Org and purple bottom Orange only, least i dont see another color

None go under the flywheel, they come straight from power pack

Removed all on port side so i could look at edge of intake gasket and look for possible hole or something unplugged like a vent or such.

Could the Pulse Limiter cause the problem, its on the side of the 2 cylinder that arent running?????
 

dave01tx

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I took another look at the reeds but this time VERY closely and there fine

Could the Pulse Limiter cause the problem, its on the side of the 2 cylinder that arent running?????
 

racerone

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The pulse limiter only comes off the crankcase for 1 cylinder.-----There are 4 separate crankcases on a V-4 motor.-----The pulse limiter is a " flow fuse " for the VRO pump.---The pulse limiter is on the same side as the #2 and #4 cylinders. The very top cylinder Is #1 on starboard side.---Top on port side is #2-----Bottom on starboard side is #3.---Bottom on port side is #4
 

dave01tx

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so from back of the engine #1 is lower left? that where it goes into the case.
the vro is removed and that pulse limiter and hose is driving a standard fuel pump like on older engines
 

racerone

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?????--The pulse limiter does NOT GO on the #1 cylinder.------The pulse limiter comes off 1 of the 4 crankcases !!!---The #1 cylinder is the TOP CYLINDER on all Johnson / Evinrude outboards.----The standard pump ( just 2 nipples ) should be mounted directly over a pressure pulse port on the intake manifold.----The pulse limiter is not needed on a regular pump.----
 

dave01tx

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On this motor the pulse limiter is on the port(left side) of motor closer to the botton but almost middle.

this problem existed when the vro unit was on and functioning.

I see where a standard pump fits but other stuff like selonoid and such wont allow mounting it to the vent hole and 2 bolts, that vent hole is plugged with a olt which looks factory
 

racerone

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I know where the pulse limiter is on these V-4 motors !!----Bring it over and I show you where to install the regular fuel pump !---It mounts between the starter and lower carburetor.------The solenoid should not be mounted on the intake manifold !!
 

dave01tx

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Im not trying to be rude and certinally nottalk bad about anyone helping me, and ur clearly trying to help me.

The seloniod is mounted on the crack case port(left) side behind the starter, perhaps i mistyped.

The pulse line that fed the vro pump............... hold on going to triple check what im fixing to say is on the port side of the motor but since you knew where the pump belongs and i didnt till u told me where to look u obviousely know ur ****.

That place has a screw filling the vent, theres another place futher back on that side that to me looked like for a pump.

Im attaching a pix, right under where the pump should mount is what im calling the pulse limiter so im assuming yu will tell me to plug that hole and mount the pump right.
 

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racerone

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You are now seeing where the pump should mount.-----Directly over the pressure pulse port ( remove that plug ) with a gasket.----A 2 nipple pump.----Remove the pulse limiter and throw it away.----Plug the hole where the pulse limiter was.
 

dave01tx

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Sep 24, 2020
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yes, Thank You.

Ill do that then reassemble it and try fuel in each carb and spray for intake leak check.
 

dave01tx

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Reed question.... 1989 Evinrude 110HP

Some reeds arent fully closing, but really close...maybe thickness of paper open.

Some have a shim and one or more dont.

Input appreciated!
 

racerone

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Lots of motors running just fine with reeds that do not fully close on a stopped motor.----I have seen on Mercury manual that an opening of up to 0.007" is acceptable.------Would be no different on a Johnson / Evinrude !!!----Why the question ?
 

dave01tx

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Reason for the question is, replacing the intake gasket and figured i should give everything inside a good look while its open.

Motor wasnt running on 2 port side cylinders, compression, spark and carbs are perfect.

Thanks Racerone.
 

racerone

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Reed valves are not the problem------From where I sit I say that some wires are mixed up.-----Spark at the wrong time.----Use a marker and mark TDC 1 / 2 / 3 / and 4 for each cylinder on the flywheel.----Hook up timing light and check the firing at idle.-----Should be close to each mark.----Or put boat in lake or river.------Take boat for a spin with an assistant driving.---Use a strong / strong flashlight and look into each throttle bore.-----Compare amount of fuel coming up each main nozzle
 
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dave01tx

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Stumped Any inout appreciated

1989 Evinrude 110 Hp

Symptom:
Engine runs good on Cyl#1, #2 plug disconnected make no difference in rpm, #3 disconnact slows rpm but not near as much as #1, #4 makes no difference either like #2

My understanding of the firing order is 1-2-3-4 From back of motor its like this 2 1
4 3

All Cyl 125 PSI
Flywheel marked for 1,2,3 and 4 cylinders, Timing light shows all firing at the right time, 1 lights on 1 etc
Replaced Intake gasket
Cant find any unplugged holes
New Spark Plugs, If i disconnect plug wire from spark plug i get spark upto bout 1/2 inch on all Cylinders
Gone thru Carbs 4 times,all plug removed and all channel cleaned with wire and high pressure air and carb cleaner.

Input?
 

Bosunsmate

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Apr 7, 2012
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6,135
Remove sparkplugs 2 and 4. See what electrodes look like, report back on that and clean them. Ground spark plug wires for 4 and 2, turn it over for a few seconds remove them and check both are wet with fuel. Light it to make sure its not fuel with water contamination which often happens. You thus need the motor to of turned over enough to have water in the water jackets to do this properly
 
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