Outboard will only start when given 10%-30% throttle. Will not start when given full throttle or half throttle.

[909]

What's the cause ?

 

[racerone]

Is this on your 100 HP motor ?

 

[909]

9.9 / 15

 

[racerone]

The owners manual should have starting instructions.-----Or your dealer will explain how to start a motor.

 

[909]

I have 6 of these outboards. Not my first time.

 

[racerone]

I never have trouble starting them.

 

[909]

Same here with the other 5

 

[racerone]

model # of the one that will not start as expected?----And what serious trouble shooting have you done ?

 

[909]

I've rebuilt carb three times, new plugs, cdi, coils, ignition wires, thermostat, impeller, gear oil, and replaced everything under the flywheel. Compression is 121 and 119. Beautiful strong spark both warm and cold

 

[909]

Model is an E10recc

 

[F_R]

It is not intended to start at high throttle settings. Are you saying the electric starter won't crank, or are you saying it will crank but not start running?

 

[909]

Its rope - pull start . All my other outboards start easily with a bit of throttle. This refuses to start unless only the slightest amount of throttle is applied .

 

[racerone]

Choke flapper may be closed, but perhaps choke function is not " working" with throttle plate open.

 

[909]

Interesting

 

[racerone]

Lot of parts installed as per post #9.----Were these parts bad as per some recognized testing procedure?----Or just wild guessing ?----Are you now going to do more trouble shooting ?

 

[909]

I took them from a working DONOR motor.

Bad parts put back on the DONOR motor worked perfectly fine.

 

[racerone]

As I have said before.----Time for orderly trouble shooting.----Not the same as lets try this part approach.

 

[909]

How

 

[racerone]

----leroysramblings-----Is a teaching / learning opportunity.

 

[RBoyd1971]

If I had to guess, I'd say it's running a little lean on the slow speed, but that's just a guess.