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Yanmar Gearbox

KM35P

Kanzaki-built parallel-shaft cone-clutch gear with 2.36 or 2.61:1 forward, Yanmar's current shaft gear for the 3JH and naturally aspirated 4JH engines.

The KM35P is a mechanical servo cone-clutch marine gear with an in-line output, developed by Kanzaki for sailboat use. Kanzaki and Yanmar give an input torque rating of 129 Nm at 3,800 rpm, forward ratios of 2.36 and 2.61:1 with a 3.16:1 reverse, a dry weight of 12 kg, 0.5 L of oil and a standard SAE #5 flange (other SAE and Borg-Warner sizes optional).

Yanmar lists it for the 3JH5E, 3JH40, 4JH5E, 4JH45 and 4JH57. It continues the ratios of the older KM3P and is a current product; the down-angle alternative is the KM35A.

Sources

  1. 1. KM35P marine gear — Kanzaki Kokyukoki Mfg. Co., Ltd.
  2. 2. KM35P (Mechanical Clutch) transmission outline and specifications (rev. 01/08) — Yanmar
  3. 3. Kanzaki Gears product page with gear/engine applicability table (2020 capture) — Yanmar Marine International
  4. 4. JH Series Operation Manual 4JH45, 4JH57, 4JH80, 4JH110 (0AJHC-M00011, 2014) — Yanmar
  5. 5. 4JH57 datasheet — Yanmar

Specifications compiled from manufacturer sources.