Can-Am Outlander 800R Battery Not Charging? Stator Symptoms, Testing & 420296907 Fitment Guide

If your Can-Am Outlander 800 or 800R battery keeps going dead, replacing the battery may not solve the problem.

A charging-system fault can let the ATV start normally after a full charge, then leave you with slow cranking, low voltage, unstable electrical accessories, or a machine that will not restart after a ride.

The stator is one possible cause, but the battery, regulator/rectifier, connectors, wiring, and grounds can create many of the same symptoms. The right approach is to test the system before replacing parts.

If testing points to a stator fault, compare your original unit with this 18-pole replacement stator for Can-Am Outlander and Renegade 800/800R. This replacement uses the 420296907 / 420685920 reference family with an approximately 104 mm outer diameter and 41–42 mm inner diameter.

Common Can-Am Outlander 800R Stator Failure Symptoms

A stator does not always stop working all at once.

Heat, vibration, damaged winding insulation, or an internal electrical fault can gradually reduce output. The ATV may continue running from battery power until the battery no longer has enough stored energy to support the electrical system.

Common warning signs include:

• The battery repeatedly loses charge.
• A new or fully charged battery becomes weak again.
• The starter cranks more slowly after riding.
• The ATV starts normally but will not restart later.
• Battery voltage stays low with the engine running.
• Lights, the display, or electrical accessories become unstable.
• Charging performance gets worse when the engine is hot.
• The stator or regulator connector becomes dark, loose, or overheated.
• Stator test readings are inconsistent.
• Windings appear dark, burned, or physically damaged.

The important point is that these are charging-system symptoms, not proof of a failed stator.

A weak battery can fail to hold a charge. A faulty regulator/rectifier can prevent correct battery charging even when the stator is generating power. Loose or corroded connections can also add resistance, creating voltage loss and heat.

That is why diagnosis should come before parts replacement.

Bad Stator, Battery, or Regulator/Rectifier?

From the driver's seat, these faults can feel very similar.

Use the test results to narrow down the problem:

A simple rule works well here:

Test first. Replace second.

A new stator cannot fix a weak battery, a failed regulator, a poor ground, or a damaged connector.

How to Test a Can-Am 800 / 800R Stator

You do not need to replace the stator just because the battery went flat. Work through the charging system in a logical order.

1. Start With the Battery

Fully charge the battery before testing anything else.

Check:

• Positive and negative terminals
• Battery cables
• Engine and chassis grounds
• Corrosion
• Loose hardware

If the battery is older or questionable, perform a load or capacity test.

A battery can show reasonable voltage while sitting and still fail when the starter puts it under load.

2. Inspect the Connectors and Wiring

Can-Am ATVs often operate around mud, water, heat, dust, and vibration, so connector condition matters.

Inspect the stator and regulator/rectifier connections for:

• Melted plastic
• Darkened terminals
• Loose pins
• Corrosion
• Moisture
• Damaged insulation
• Rubbed or pinched wiring

A poor connection increases electrical resistance. Resistance creates heat, and heat can eventually damage the connector.

Do not connect a replacement stator to badly burned or corroded terminals without repairing them first.

3. Check Running Battery Voltage

Measure voltage across the battery with the engine off.

Then start the ATV and repeat the test using the RPM and procedure specified for your exact model and charging-system version.

You are looking for evidence that the system is actually raising and controlling battery voltage while the engine runs.

If voltage remains low, continue testing. The stator is only one possible cause.

4. Compare the Stator Outputs

This replacement uses a three-wire output configuration.

With the stator disconnected from the regulator/rectifier, identify the leads as:

A, B, and C

Compare:

A–B
B–C
C–A

The measurements should be reasonably consistent when tested under the same conditions.

One combination that is substantially different may indicate a damaged winding or stator lead.

5. Check for an Unwanted Short to Ground

With the stator disconnected, test each output lead against a clean engine ground.

Where the winding should remain isolated, unwanted continuity to ground can indicate damaged insulation or an internal short.

6. Compare AC Output

Set the multimeter to AC voltage and compare the same lead combinations at the same engine speed.

If one output is noticeably lower than the others, the stator deserves closer inspection.

If all outputs are balanced but battery charging remains abnormal, move your attention toward the regulator/rectifier, wiring, connectors, and grounds.

Do not use one generic resistance or AC-voltage number for every Outlander or Renegade 800R. Charging-system specifications can vary by year and trim, so model-specific service information should be the final reference.

420296907 vs 420685920: What Does the Supersession Mean?

This is one of the most important fitment details for this stator family.

The earlier 420296907 stator appears in factory parts diagrams for older Can-Am applications, including the 2008 Outlander 800. 

Later Can-Am parts listings identify 420685920 as the 420W stator plate that replaces or supersedes 420296907. OEM-style parts listings explicitly show 420685920 — Stator Plate, 420W — supersedes 420296907. BRP currently lists 420685920 itself as a 420W Stator Plate. 

That makes the supersession useful for identifying the correct stator family.

However, a superseding number does not mean every Outlander 800R or Renegade 800R uses this stator.

Trim matters.

For example, a 2012 Outlander 800R parts diagram lists 420685920 for the STD version, while an XT configuration uses a different stator number, 420685632. A 2011 Renegade diagram likewise distinguishes the standard 420296907-family stator from a different XXC stator. 

That is why the safest fitment rule is:

Do not buy by “Outlander 800R” or “Renegade 800R” model name alone.

Once the OEM family and charging-system version are confirmed, compare your original part with this Can-Am 420296907 / 420685920 18-pole replacement stator.

Related aftermarket cross-reference catalogs may also group numbers such as 420684850 and 420684040 with this replacement family, but those references should be treated as fitment clues rather than proof that every application is identical. 

How to Confirm the Correct 18-Pole Replacement Stator

Before ordering, compare the replacement directly with the original stator.

For this part, the main identification points are:

Also compare:

• Connector shape
• Terminal layout
• Harness length
• Wire exit location
• Mounting-hole positions
• Overall stator shape
• Original charging-system version

When Should You Replace the Stator?

Stator replacement makes sense when testing points back to the stator itself.

That includes:

• One output is clearly different from the others.
• AC output is below the correct specification.
• A winding has an unwanted path to ground.
• Output drops significantly when the ATV becomes hot.
• Windings show obvious heat or insulation damage.
• Battery, regulator, connector, and wiring tests point back to the stator.

Do not replace it yet when:

• The battery has not been properly tested.
• The regulator/rectifier has not been checked.
• Burned connectors remain unrepaired.
• A wiring or ground fault is still present.
• The OEM number, dimensions, or connector do not match.

Frequently Asked Questions

What are the symptoms of a bad stator on a Can-Am Outlander 800R?
Repeated battery drain, slow cranking, low running voltage, difficulty restarting after a ride, charging problems that worsen with heat, and abnormal stator output are common warning signs. Similar symptoms can also come from the battery, regulator, or wiring.

How do I test a three-wire Can-Am stator?
Start with a fully charged battery, inspect the connectors, check running battery voltage, compare each stator lead-to-lead combination, test the windings for an unwanted path to ground, and compare AC output at the same engine speed.

Does 420685920 replace 420296907?
Yes, OEM-style parts listings show 420685920 as the 420W stator plate that supersedes 420296907 in multiple compatible applications.  Exact vehicle fitment should still be confirmed.

Will this stator fit every 2009–2015 Outlander 800R or Renegade 800R?
No. Different trims and charging-system configurations were used. Check the OEM number, connector, 18-pole layout, approximately 104 mm outer diameter, 41–42 mm inner diameter, wiring, and mounting pattern before ordering.

Final Diagnosis and Replacement Advice

When a Can-Am Outlander or Renegade keeps killing batteries, the best repair starts with diagnosis rather than guesswork.

Test the battery. Inspect the connectors and grounds. Check running voltage. Compare the stator outputs. Then evaluate the regulator/rectifier and wiring.

Fitment deserves the same care. A matching engine size or “800R” badge is not enough when different trims can use different stator configurations.

If testing confirms stator failure and your original unit matches the 420296907 / 420685920 family, 18-pole layout, three-wire connector, and approximately 104 × 41–42 mm dimensions, review this replacement stator for compatible Can-Am Outlander 800, Outlander 800R, Renegade 800 and Renegade 800R models before ordering.

Correct diagnosis and correct fitment are what turn a parts replacement into a reliable repair.