Where can I buy a rectifier for a 15 amp earthwise lawnmower

look on youtube they are really easy to do

Try a giggle search for "Spare parts, X-brand pole saw" substituting your brand for "X".
Else fabricate one from an old champagne (or wine) cork, and fix it with string to the pole dancer oops saw so it can't run away again.

I did the former and instantly and got
https://www.amazon.com/Earthwise-CS90083-Replacement-CCS30008-CVPS41008/dp/B001PTG9IM
amongst other results. Had exactly the same problem with my air compressor. It's corked now.

There's a website that has all thi s information about all this and manuals everything totally free there are many actually but I personally like few .. let me know if u need help
thanks

charger for same does not show any lights..so should i assume the charger is not working?

If the circuit breaker trips there are three possible reasons
1. the motor is being overloaded - clean underneath ( as recommended above); or if the grass is too wet or too long or both you may need to handcut; or the motor bearings need lubricating (same problem as me-how?)
2. There is an electrical fault - check the plug and cord (as above) or get an electrician to check the motor and connections; or the carbon brushes to the motor need replacing
3. You have a faulty circuit breaker! - borrow and test with a replacement

Red blinking light according to test at Batteries Plus means that the charger is kaput.

yes it could be

check your battery 1st , then check the stator a/c output

• 10 or 16 Amps DC regulated for charging
battery
• Two black leads (C) from stator
• Yellow connector (D) with two pin
terminals
• Two yellow leads (E) to regulator-rectifier
(F)
• One red lead (B) from regulator-rectifier
to red connector output lead (A)
• 10 and 16 Amp systems use the same
stator, color coding and regulator-rectifier
• Alternator output is determined by the
flywheel alternator magnet size


The stator and regulator-rectifier are the same
for the 10 and 16 Amp systems. The system
output is determined by the flywheel magnet
size.
Test Alternator Output
1. Temporarily disconnect stator wire
harness from the regulator-rectifier.
2. Insert RED test lead (A, Figure 28) into the
V ω receptacle in the meter.
3. Insert BLACK test lead (B) into COM
receptacle.
4. Rotate selector to AC Volts position.
5. Insert RED (A) and BLACK (B) test lead
probes into output terminals (D & E) in
YELLOW connector (C). (Test clip leads
may be attached to either terminal).
6. With the engine running at 3600 rpm, the
output should be no less than:
• 20 volts - 10 Amp System
• 30 volts - 16 Amp System
7. If No or Low output is found, check for
bare wires or other defects. If wiring
defects are not found, replace the stator.
voltage depending on alternator type and magnet size

then check the regulator / rectifier , make sure it is grounded properly

make sure battery earth lead is good

i suspect loss of bat voltage is letting the afterfire solenoid close off the main jet

let me know model and type codes off engine & i will try help further

cheers

Go to www.precisionope.com and order one.
Good day.

I assume you mean convert it to corded, connected to the mains; cordless is electric as well.
It is possible but there are conversion losses as compared to using a 'native' AC corded mower motor.
It also depends on why you want to convert it. If you find the battery unit underpowered, adding a 12v power supply and cord will not solve that, it will just extend the run-time to continuous, assuming the motor does not overheat, as it is probably designed to match the battery run length for on/off cycle times.
You could consider trading, or selling yours and buying a corded mower.