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JON, Small Engine Technician
Category: Small Engine
Satisfied Customers: 1391
Experience:  Certified Small Engine Technician
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I'm look for a .pdf manual for a blackmax 8125, it's been a

Customer Question

i'm look for a .pdf manual for a blackmax 8125
JA: I'll do all I can to help. How long have you been dealing with this?
Customer: it's been a long time since I ran it. Other than the gas I forget which switches need to be on to run it
JA: Do you plan on doing the work yourself?
Customer: I'm just trying to start it
JA: Do you have fuel in the tank? If so, is the shut-off valve open and the fuel clean?
Customer: the tank was stored dry & I put fresh gas in it an hour ago. I disconnected the fuel line to verify gas getting to carb & some dribbled out after I opened the fuel valve.
JA: Anything else we should know to help you best?
Customer: I pulled the choke out. There's an on/off switch next to the a/c outlets & another switch under the front panel (red knob).Do those have to be "on". The red knob is hard to see
Submitted: 1 month ago.
Category: Small Engine
Customer: replied 1 month ago.
Honda engine GX 390.
Expert:  JON replied 1 month ago.
Here is a link to all the GX390 engines.
Honda carbs are known for clogging in the main center jet. Remove carb bowl and use a small wire (breadtie) to push through the center jet. You should be able to see it through the intake when pushed through. If you don't have a wire, spray the center jet with carb cleaner and a straw
Expert:  JON replied 1 month ago.
Expert:  JON replied 1 month ago.
I can send generator owners manual but will need model and serial nunbers
Customer: replied 1 month ago.
First I need to know which switches need to be on. Many switches w/o labels
Honda. GX390 . There's a decal hidden by the air cleaner, can't read the numbers.
BlackMax 8125 13 hp Honda. What switches need to be on?
Expert:  JON replied 1 month ago.
The only switch that has to be on is the on/off switch for the ignition coil.What is the model number?
It will begin with BM
Customer: replied 1 month ago.
The engine switch, is it the same as the on /off switch? Is it to the right of the recoil cord housing ? It is well hidden where I can't read which direction is on. Pointing up or down for "ON"
Expert:  JON replied 1 month ago.
Normally up is on or there will be a 0 = off and a | for On.
Customer: replied 1 month ago.
The main panel (outlets etc) hides a RED switch. The knob points towards the rear of the entire generator. The decal is on the far side of the knob - out of sight. It tilts up or down. Which way for on?
Expert:  JON replied 1 month ago.


Customer: replied 1 month ago.
Can I send you a picture of the knob with the on / of not visible?
Simply, should it point upward for on?
That would be the sensible way. But Black Max couldn't put the decal in front of the switch (not sensible )
Expert:  JON replied 1 month ago.

yes, please upload a pic here so I can view it

Expert:  JON replied 1 month ago.

are you referring to the switch in the middle of the machine?

Expert:  JON replied 1 month ago.

h​ere are some pics. I put a blue circle around the switch that should be up

Customer: replied 1 month ago.
What's this switch for on the recoil housing? It's RED & in the right side of the pic.
The switch you circled is on the outlets (main front) panel. I wouldn't have known it was the coil switch.
Expert:  JON replied 1 month ago.
That is the Honda engine kill switch. On is down and off is up
Expert:  JON replied 1 month ago.
Google Honda engine kill switch for a factory pic
It looks like it's on now but hard to tell from the picture angle
Expert:  JON replied 1 month ago.
Here is example pic
Customer: replied 1 month ago.
It's 10pm & dark outside. I'll try to start the Gen tomorrow. I guess we've covered all topics to start the engine.
Fresh fuel - yes
Turn gas valve on - not clogged, I checked
Kill switch pointing down.
Coil switch (next to outlets ) on
Pull choke all the way out
Pull recoil rope to start
Sounds Ok?
Expert:  JON replied 1 month ago.
Coil switch it the switch you sent pic of. Sorry, I misspoke.
The rest is good
Expert:  JON replied 1 month ago.

how did things go? Let me know if you need anything else as I am here for you.

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