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Yanmar 2GM20F marine engine

Yanmar 2GM20F

1983–200418 HP2-cylinderdiesel
Dieselheat exchanger cooledinboardsaildrive
Manufacturer PageDocumentation

Freshwater-cooled variant of the 2GM20.

Specifications

Power18 HP @ 3,400 RPMCylinders2
Displacement635 cc (38.8 ci)Bore x Stroke75 x 72 mm
Fuel TypeDieselAspirationNaturally Aspirated
CoolingHeat exchangerDriveInboard, Saildrive
Weight114 kg (251 lb)Dimensions (LxWxH)643 x 482 x 545 mm
Fuel Use3.38 L/hrOil Capacity2 L
TransmissionKM2P

Parts for the Yanmar 2GM20F

35 catalogued parts. Prices are reference figures; each “Find on Amazon” link opens a search for that part — confirm fitment against your engine's serial before ordering.

Cooling System (9)
  • Sea Water Pump — Yanmar 2GMF/2GM20F/3GMF/3HM/3HMF/3GM30F
    fits: 721575-42702
    $256.15
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  • THERMOSTAT
    $82.70
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  • Thermostat V17 — Yanmar 2GMF/3GMF/3HMF/2GM20F/3GM30F/3HM35F
    fits: 20111
    $80.45
    SearchAmazon →
  • IMPELLER
    fits: Yanmar 2QM20, 3QM30, 3QM30, 2GMF, 3GMF, 2GM20F, 3GM30F, 3HM, 3HMF, 3HM35, 3HM35F, 2QM
    $55.76
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  • Johnson MC97 Pump Impeller 09-1026B for Johnson F4/F5 Pumps (6 Blade)
    $47.64
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  • Orbitrade 8-24003 Impeller Kit for Yanmar Engine Cooling Pumps
    $41.83
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  • CEF Impeller for Johnson F4B & F5B Pumps (Neoprene)
    $27.22
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  • Thermostat Gasket — Yanmar 2GMF/2GM20F/3GMF/3GM30F/3HMF/3HM35F
    fits: 129350-49541
    $8.47
    eBay· $8.50 ↗
  • IMPELLER GASKET
    fits: Yanmar 2QM20, 3QM30, 3QM30, 2GMF, 3GMF, 2GM20F, 3GM30F, 3HM, 3HMF, 3HM35, 3HM35F, 2QM
    $4.46
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Fuel System (6)
  • Yanmar Air Filter ( Intake Element )
    fits: Yanmar 2GM, 2GMF, 3GM , 3GMF, 2GM20 , 2GM20F, 2GM20-YEU, 2GM20F-YEU, 3GM30, 3GM30F, 3GM30-
    $36.18
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  • Orbitrade 8-56541 Air Filter Insert for Yanmar 2/3GM & 2/3YM Engines
    $35.74
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  • Orbitrade 8-55710 Fuel Filter Element for Yanmar Diesel Engines
    $15.80
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  • Yanmar Secondary Fuel Filter
    fits: Yanmar 1GM, 1GM10, 2GM, 2GMF, 3GM, 3GMF, 2GM20, 2GM20F, 2GM20F-YEU, 2GM20-YEU, 3GM30, 3GM3
    $9.42
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  • Yanmar Secondary Fuel Filter O-Ring 1A S-44.0
    fits: Yanmar Fuel Filter # 104500-55710
    $2.71
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  • Yanmar Nylon Secondary Fuel Filter Housing Bleed Washer
    fits: Yanmar Fuel Filter # 104500-55710
    $1.55
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Lubrication (7)
  • Mann W 67/1 Spin On Oil Filter for Kubota Nanni Beta Yanmar
    $16.90
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  • Fram FT5447 Spin-On Oil Filter for Honda, Mitsubishi & Yanmar Engines
    $16.00
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  • Yanmar 119305-35170 Oil Filter for TNV & Some TNE Series Engines
    $15.76
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  • Mann L10199US Marine Spin-On Oil Filter Element M20 x 1.5mm
    $11.07
    SearchAmazon →
  • Oil Filter Kubota Onan — Yanmar
    fits: 119305-35151
    $10.58
    Buy onAmazon ↗
  • Yanmar Oil Filter
    fits: Yanmar 1GM, 1GM10, 2GM, 2GMF, 3GM, 3GMF, 2GM20, 2GM20F, 2GM20F-YEU, 2GM20-YEU, 3GM30, 3GM3
    $10.24
    Buy onAmazon ↗
  • Oil Filter Genuine — Yanmar
    fits: 119305-35151
    $9.53
    Buy onAmazon ↗
Belts (4)
  • V Belt Alternator Original — Yanmar 2GM20F/3GM30F
    fits: 25132-003700e
    $25.40
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  • Yanmar W/P V-Belt ( M19 )
    fits: Yanmar 2GM , 2GMF, 3GM , 3GMF, 2GM20 , 2GM20F, 2GM20-YEU, 2GM20F-YEU, 3GM30, 3GM30F, 3GM30
    $19.40
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  • Belt Alternator — Yanmar
    fits: 25132-003700
    $17.98
    Buy onAmazon ↗
  • Yanmar V-Belt
    fits: Yanmar 2GM20F, 2GM20F-YEU, 3GM30F, 3GM30F-YEU
    $15.12
    Buy onAmazon ↗
Anodes (4)
  • Zinc Pencil Engine Anode for Yanmar (M8 Thread)
    $20.78
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  • Zinc Pencil Engine Anode for Yanmar YS (M8 Thread)
    $6.63
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  • Yanmar 2GM20F engine anode 27210-200300
    fits: 27210-200300
    $5.73
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  • Yanmar engine pencil zinc anode (20mm dia x 30mm long, M8 thread); 2 required for the 2GM20F
    fits: 27210-200300
    Buy onAmazon ↗
Gaskets & Seals (1)
  • Orbitrade 60002 Gasket & O-Ring Kit for Yanmar Engines 2GM20F & 2GM2D
    $88.33
    Buy onAmazon ↗
Service Kits (4)
  • Orbitrade 8-10020 Service Kit for Yanmar Engines 2GMF/20F & 3GMF/30F
    $112.70
    SearchAmazon →
  • Shaft Kit Pump — Yanmar 2GM20/2GM20F/2YM15/3GM30/3GM30F/3YM20
    fits: 128990-42560
    $105.85
    eBay· $164.67 ↗
  • Service Kit Yansrv 16 — Yanmar 2GM20F
    $74.10
    SearchAmazon →
  • Piston Ring Kit 20 30 Std V4 — Yanmar 1GM10/2GM20C/2GM20F/3GM30
    fits: 20608
    $43.39
    SearchAmazon →

Part data aggregated from marine-diesel parts catalogues. As an Amazon Associate, SailPages earns from qualifying purchases.

Related Models

Predecessor
Yanmar 2GM
15 HP · 1980–1983

Sailboats with Yanmar 2GM20F(28)

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