If your post-2013 Yanmar Common Rail engine is stuck with the stock alternator, charging can feel painfully slow—especially when you're running lights, fridge, electronics, and maybe even lithium batteries. The Balmar XT-CR-170 fixes that with proven high-output performance tailored to your engine.
This alternator uses a state-of-the-art braided stator design to pack exceptional output into a compact case—delivering slightly more power than the older AT-Series 165A while running 5–10°C cooler for better longevity in tight, hot engine bays. The built-in Smart Ready® regulator adds fault tolerance: basic reliable charging for conventional batteries right away, with no extra hardware needed.
Key Specs & Fitment
- Output: 170A at 12V
- Mount: 3.15" Dual Foot (saddle)
- Case Ground
- Configured for Yanmar Common Rail (post-2013 models)
- Replaces: XT-DF-170-J10-3YM, XT-DF-170-K6-3YM
- Pulley Options: K-6 Serpentine (XT-CR-170-K6) or J-10 AltMount (XT-CR-170-J10)
At cruising speed, expect over 2 kW of charging capacity—enough to keep house banks happy without constant idling or generator use.
Smart Upgrades for Better Performance
- Add a MaxCharge voltage regulator for full multi-stage control, precise voltage/temperature compensation, and lithium compatibility.
- Better yet, grab the full charging kit—it bundles the MaxCharge with temp sensors for optimized, safe charging.
Don't Skip Safety Basics
A 170A alternator pulls serious current:
- Use at least 1/0 AWG (zero gauge) positive cable.
- Make sure the engine ground (DC negative) is 1/0 AWG or larger (2/0 or 4/0 AWG).
- Install circuit protection—like our battery terminal fuse with a 175A fuse—at the battery end.
If you're on lithium batteries, add the APM-12 Alternator Protection Module to handle voltage spikes from BMS disconnects—it's cheap insurance against alternator damage.
