Understanding YANMAR engine model codes Most engine model designations are on an engine data plate, on the front or the top of the engine. Some older engines have the data plate on the adapter …

Aug 24, 2025 · I have DOM 1993 Yanmar 3GM30F in my boat and the engine runs fine with the exception of the ubiquitous and occasional "click" starting problem. However, a few weeks ago, I …

23-1 1 119620-49290 (A=*2000.04) BLOCK ASSY, CYLINDER BLOCK ASSY, CYLINDER PLUG PT1/8 PLUG 30 (SUS) STUD, CYL. HEAD NUT, CYL. HEAD O-RING 1A P-10.0 GUIDE, O-RING …

Aug 3, 2014 · From the "Yanmar GM-HM Workshop Manual": "Transmission models KM2A, KM2C, KM2P, KM3A and KM3P The recommended transmission oil is an engine oil that meets API …

Jun 30, 2016 · Have a Yanmar 3YM20. Replaced the U-shaped elbow in Jan. after just over 500 hours. Made a noticeable difference in performance. I idle very little and only when necessary and always …

Dec 7, 2024 · I will just say that, on the Yanmar GM series engine, the heavy overhanging transmission end requires the heavier engine mounts (both 100#) and the other end requires the lighter engine …

Oct 28, 2008 · The manual says to use 30 or 40 weight for my climate, but I've found many sources on the internet say to use 15W-40, which is what I think I used on my last oil change. Is 15W-40 ok to …

Oct 24, 2010 · Re: Yanmar Diesel Hours, How may is too many? I have seen farm tractors that run in very dusty conditions and get fifty hours per week go past 4000 hours with no major work, just oil and …

Aug 11, 2006 · Another problem we are having with our new 36 is the yanmar engine shut off switch. It does not happen all of the time. In fact, it has only happened twice on two long runs while the engine …

Apr 11, 2011 · During the past 5 years I've owned two new boats an H356 with a 3GM Yanmar and an H44 with a 4JH Yanmar. Each engine experienced the same coolant leak during the winter storage. …