New Lower Unit Gearcase Seal Kit Compatible With 2004-2023 Suzuki Df250 Df250t 250Hp V6 4-Stroke

SUZUKI DF250 / DF250S / DF250SS / DF300 V6 LOWER UNIT GEARCASE SEAL KIT — Comprehensive Service Kit (2004-2023+):

STANDARD ROTATION V6 PLATFORM CONTEXT:
• Specifically for NON-A and NON-B Variant V6 Standard Rotation Models
• A-Suffix Models (DF250A, DF250AP, DF300A, DF300AP) Use Different Kit
• B-Suffix Models (DF300B Dual Prop) Use Different Kit
• 55-Degree V-Block 6-Cylinder DOHC 4-Stroke

SUZUKI DF250 SERIES STANDARD ROTATION APPLICATIONS:
• Suzuki DF250 250 HP V6 4-Stroke Outboard Standard Rotation (2004-2023)
• Suzuki DF250T 250 HP V6 Long Shaft (2004-2023)
• NON-A and NON-B Variants Only

SUZUKI DF250S / DF250SS BASS BOAT PERFORMANCE VARIANT APPLICATIONS:
• Suzuki DF250S 250 HP V6 4-Stroke Bass Boat Variant (2007-2023)
• Suzuki DF250SS 250 HP V6 4-Stroke Bass Boat Performance (2007 & up)
• Bass Boat Specific Variant with 2.08:1 Gear Ratio (vs. Standard DF250)
• Designed for High-Performance Bass / Pontoon / Flats / Bay Boats

SUZUKI DF300 SERIES STANDARD ROTATION APPLICATIONS:
• Suzuki DF300 300 HP V6 4-Stroke Outboard Standard Rotation (2007-2023)
• Suzuki DF300X 300 HP V6 X-Shaft Variant (2007-2011)
• NON-A and NON-B Variants Only

⚠️ NOT COMPATIBLE WITH:
• Suzuki DF250A / DF250AP — Use 25700-93L02 (Selective Rotation Models)
• Suzuki DF300A / DF300AP — Use 25700-93L02 (Selective Rotation Models)
• Suzuki DF300B — Use 25700-98L05 (Dual-Prop Variant)
• Suzuki DF300B / DF300BMD / DF350A / DF350AMD — Use 25700-87M10
• Suzuki DF150 / DF175 / DF200 / DF225 — Use 25700-93J00 (Different Kit)
• Suzuki DF90 / DF100 / DF115 / DF140 — Use 25700-92J00 (Different Kit)
• Suzuki DF60 / DF70 / DF80 / DF90 — Use 25700-99E00 or 25700-87L01
• 2-Stroke Suzuki DT-Series Outboards
• 2-Stroke OMC Johnson/Evinrude V6 Outboards
• Johnson/Evinrude E-TEC V6 Outboards
• MerCruiser / Mercury / Yamaha / Honda V6 Outboards

SPECIFICATIONS:
• Type: Lower Unit Gearcase Seal Kit (Comprehensive)
• Application: Suzuki DF250 / DF250S / DF250SS / DF300 V6 4-Stroke
• HP Range: 250 HP and 300 HP
• Engine Type: 4-Stroke V6 ONLY
• Cylinder Configuration: 6-Cyl V6 (55-Degree V-Block DOHC)
• Generation: Standard Rotation (NON-A, NON-B Variants)
• Year Coverage: 2004-2023+ (DF250) / 2007-2023+ (DF300)
• Includes: Multiple Seals, O-Rings, Gaskets, Drain Plug Gasket
• Material: Marine-Grade Rubber Compounds (Saltwater + Heat Resistant)
• Function: Complete Lower Unit Seal Replacement
• Condition: New

OEM PART NUMBERS:
• Suzuki: 25700-98J01 (Current OEM Supersession)
• Suzuki: 25700-98J00 (Old Part Number — Superseded)

OEM SUPERSESSION CHAIN (Suzuki):
• 25700-98J00 → 25700-98J01

KIT CONTENTS:
• Lower Unit Gearcase Seals
• Multiple O-Rings (Various Sizes / Positions)
• Oil Seals (Prop Shaft and Drive Shaft Positions)
• Drain Plug Gasket
• Other Required Gaskets for V6 Suzuki Standard Rotation Lower Unit

WHEN TO USE THIS KIT:
• Lower Unit Complete Rebuild
• Annual Lower Unit Service Interval
• Water in Gear Oil (White / Milky Appearance)
• Gear Oil Leaking from Prop Shaft Area
• Gear Oil Leaking from Drive Shaft Area
• Replacing Forward / Reverse Gear Thrust Bearings
• Replacing Prop Shaft Bearings
• Drive Shaft Service
• Routine Preventive Maintenance for V6 4-Stroke

SYMPTOMS REQUIRING SEAL KIT REPLACEMENT:
• Milky / White Gear Oil at Service Drain (Water Contamination)
• Gear Oil Leaking from Prop Shaft Area
• Gear Oil Leaking from Drive Shaft Area
• Failed Pressure Test During Routine Service
• Lower Unit Running Hot
• Cloudy / Discolored Gear Oil
• Loss of Lubrication
• Routine Annual Service Interval Reached

INSTALLATION:
• Step 1: Drain old gear oil completely (note color / condition)
• Step 2: Remove lower unit from outboard
• Step 3: Take photos and notes of disassembly order / orientation
• Step 4: Disassemble gearcase per Suzuki service manual
• Step 5: Remove all old seals, gaskets, o-rings
• Step 6: Clean all sealing surfaces thoroughly
• Step 7: Inspect gearcase housing for damage or corrosion
• Step 8: Install new seals with proper orientation (lip direction critical)
• Step 9: Install new gaskets and o-rings with light marine grease
• Step 10: Reassemble gearcase per Suzuki service manual torque specs
• Step 11: Pressure test gearcase before reinstalling lower unit
• Step 12: Reinstall lower unit to outboard
• Step 13: Refill with proper Suzuki gear oil (verify capacity per service manual)
• Step 14: Test forward and reverse operation

⚠️ IMPORTANT — SUZUKI MOTORS DON'T ALWAYS GO BY YEAR:
• Suzuki motors don't always correspond to specific manufacture years
• Identify your engine by MODEL NUMBER (DF250, DF250S, DF250SS, DF300, DF300X)
• Verify it is NOT an A-suffix or B-suffix variant before ordering
• Cross-reference your specific outboard serial number for accurate fitment

NOTE: Verify your OEM part number 25700-98J01 (or older 25700-98J00) before ordering. ***This kit fits ONLY DF250/DF250S/DF250SS/DF300 standard rotation V6 NON-A, NON-B variants.*** Selective Rotation A-models (DF250A/DF250AP/DF300A/DF300AP) use 25700-93L02. Newer DF300B dual-prop variants use 25700-98L05. Older DF150/175/200/225 use 25700-93J00. Replace all seals concurrently for proper lower unit longevity.