Introduction Thank you for purcha si ng a YANMAR Mar ine Diesel Engine. This Operation Manual describes the operation. maintenance and inspection of the 2GM20(F)M(C), 3GM30(F)M(C) Yanmar Marine Diesel Engines. Read this Operation Manual carefully before operating the engine to ensure that it is used correctly and that it stays in the best possible condition. Keep this Operation Manual in a convenient place for easy access. If this Operation Manual is lost or damaged, order a new one from your dealer or distributor. Make sure this manual is transfered to subsequent owners. It should be considered as a permanent part of the engine and remain so.
Constant efforts are made to improve the quality and performance of Yanmar products, so some details included in this Operation Manual may differ slightly from your engine. If you have any questions about this, please contact your Yanmar dealer or distributor. The marine gear described in this manual is Yanmar Model KM Series. With regard to the sail drive, this manual describes lube oil selection and specification only. Please read the Sail Drive Operation Manual, wh ich is supplied with the Sail Drive Unit, for further information. 3 - Operation Manual (Marine Engine) Models 2GM20(F)M(C), 3GM30(F)M(C) Code. No. 499611 - 00680