Unable to start and no water out the telltale

[Sea Rider]

How much water is running from the tell tale while testing at fast idle or bit higher, is it a consistent unaltered water flow ? If welch plugs doesn't come in a carb kit should not be removed, drilled, whatever. Did you tried starting the motor as per the Owner's Manual recommendations ?

Happy Boating​

 

[ntirado]

All: Any other settings I should be looking at to fully get this motor up to snuff?

 

[ntirado]

Sorry, I missed commenting on the telltale. The water stream is constant and seems strong (although I don’t have a comparison). I tried starting it as suggested, but because the markings on the tiller are missing, its hard to know if I have it set correctly when starting...

 

[Sea Rider]

If the tell tale is peeing uniform, the new impeller contributed for that to happen, that motor should pee much stronger when revving higher past fast idle revs once it's running strong.​

If the peeing seen at high revs is not uniform, remove the flexible rubber hose from the lower exhaust cover, insert a stiff wire, plastic cannula in out several times in a row to clean it, but if the peeing still with issues the entire exhaust cover internal water passages have built too much scale and motor will not run and cool properly and eventually will begin seeing white steam again.

Does the throttle grip still retains a high relief horizontal mark, if so rotate the grip to middle indicator, check pic 6 under post 34, try that setting. Need to rule out if it's a carb, fuel pump related issue or the motor is not igniting well the air/fuel mixture once inside the combustion chambers ?

Happy Boating​

 

[ntirado]

Well…after much work the motor started!!! Very excited. Thanks to all who contributed to this progress.
However, it’s not peeing now (tested it in a very full bucket of water covering well above the intake holes.
I removed the water pump to verify the tube and outlet grommet are aligned, blew compressed air through the tube, the thermostat seat and the pee hole, and then ran water through the water pump pipe, pee hole. It seems there is no obstruction…

Will the motor pee only after the motor reaches temperature and the thermostat opens??? I installed a brand new thermostat…

 

[racerone]

Thermostat has nothing to do with it !----The water for the tell tale does not circulate through the block !-----So motor should pee after 3 seconds.-----Water needs to be 6 or 8" above the impeller in your test bucket.

 

[oldboat1]

That's 6 to 8 inches above the pump/impeller, not the intake holes. I would put the water level about half way up the shaft in a plastic trash can. Rotate the the grip counter clockwise all the way to the neutral stop for starting (c.clockwise opens throttle, clockwise closes it).

 

[ntirado]

I started it yesterday. Took many rope pulls, but it started and it peed!!! There was lots of gray oily residue in the water. Also, after stopping it, I was again unable to start it. I feel I’m very close to cracking this mystery open, but lack the expertise…I feel there might be some fine adjustments needed that I can’t figure out

 

[ntirado]

J15RCEC Johnson motor in action
View attachment trim.0E19C1B4-ACED-4215-8B75-C53F46757A12.MOV

 

[racerone]

Did the carburetor cleaning on one of those a few weeks ago.-----Slow speed needle was about 5 turns out.-----Motor started on the first pull.-----Then adjusted for proper idle after that ( 1 turn ? out )

 

[ntirado]

Will definitely try that. Thanks!!

 

[oldboat1]

Still too shallow. Pump is at the joint for the foot. It's not a lift pump, and proper depth isn't determined by intake holes.

Don't open the needle 5 turns. Open 1 1/2 and start, then adjust. Think Racerone is saying these motors are pretty forgiving -- not so with final tuning, however, which is somewhat exacting with some differences between individual motors.

 

[ntirado]

Thanks! So, what else should I be looking at to improve the startup? I’m getting old and pulling the rope that many times to start it is affecting my old hand/arm joints

 

[racerone]

Electric start kit is on your wish list.------If you do not spin the flywheel fast enough there will be no spark.-----The needle was out 5 turns after the carburetor repairs on that motor.-----Normally I do 2 turns on those.-----After the final adjusting there is no need to adjust for the next cold start !-----Find out why this motor does not start easily !

 

[Sea Rider]

Set the air/fuel mixture screw to what the Service Manual indicates so, better is for the motor to idle towards the rich than to the lean side. Once properly set adjust the slow idle rpm screw to a point that when the motor is geared forward while the combo floats on water doesn't die, adjust as needed. Have you tried new Champion spark plugs L16V or QL77J4 or NGK equivalent gaped to 0.8 mm ?

Happy Boating​

 

[ntirado]

Thanks! I know where the slow speed adjustment needle is (it is currently 2 1/2 turns out from the full seated position). Where is this other air/fuel mixture screw?

 

[Sea Rider]

Thanks! I know where the slow speed adjustment needle is (it is currently 2 1/2 turns out from the full seated position). Where is this other air/fuel mixture screw?

The horizontal screw with an attached spring set 2.5 turns from fully seated should be the air/fuel mixture screw. Sorry, sold moons back my Evi 15 motor to have a look, if remember right the slow idle/ralenti rpm is adjusted by means of the throttle grip, try to find a Service Manual, specifies how that adjustment is done which must be made once the motor is fully operational...

Happy Boating​

 

[oldboat1]

One air/fuel mixture screw. You would have an engine idle stop on the tiller handle or on the side of the engine opposite the gear shift. You also can probably purchase a thumbscrew stop that fits on the tiller at the throttle handle. I'll disagree with Sea Rider slightly on the air/fuel mix -- recommend the leanest setting which allows the engine to idle well, shift smoothly, and accelerate smoothly. The motor will tell you if it's too lean (stalling, typically). BTW, use a 50:1 fuel to oil ratio with good 2-cycle oil -- oil ratio is critical to operation and longevity (Too much oil will not improve things -- will foul plugs. Ignore any 100:1 instructions, as those were overridden by the factory.

 

[ntirado]

Thank you all! This forum has been of great help and all progress achieved has been thanks to you all!
According to the SELOC book, the high speed idle has no adjustments. The two adjustments I can find are: 1) the Slow Speed needle which is currently at 2 1/2 turns from the fully seated position and 2) a knob at the end of the tiller which rotates. According to the manual turning it will increase/decrease idling.
I might remove the carb and re-measure the distance from the float to the housing both in the upside down/up positions to make sure those are correct.
Additionally, I found what appears to be contradictory information on the spark plug gap (one section says to set to 0.03, another to 0.04).
Fuel/oil mix is 50:1