When I purchased my boat I didn't like the look and condition of the engine mounts, particularly the port side ones that were badly rusted. The Yanmar 3J2HE engine has the integral heat exchanger and water pump impeller access on the port side above the engine mounts. So over the years those mounts appear to have had their fair share of raw water splashed over them and had rusted badly. The replacement of the engine mounts was the last thing on my winter lay up "to do list" as I could see it would be the hardest job to do. Last year I ordered new replacement engine mounts from Ellebogen in Spain. 2 x 100 (starboard side) and 2 x 150 (port side) rated mounts for USD$469 delivered to the US. Their website is here: https://ellebogen.com/en/shop-online/
They have a very good Youtube video on how to install the mounts in a confined engine space by supporting the engine and unbolting the engine mount flange from the engine and replacing each engine mount one at a time.
The issue of how to support the engine when there's only a few inches underneath as clearly there would be no way to get any jack underneath or down the side of the engine. Then I came across a video showing the use of an inflated football to act as an air jack bag lift. Eureka!
So I planned on 4hrs to replace them all last Sunday. In fact it took me 7hrs to replace them including uncoupling the prop shaft and realigning it afterwards. The last engine mount on the aft port side took me 3hrs alone. The flange bolts didn't want to budge and the access was next to impossible (I'm getting to old for this contortionist crawling boat work shit!) but finally the bolts moved after I managed to get a pipe for leverage onto the end of the socket rachet. Lots of bloody knuckles later all the mounts were replaced and shaft realigned. The last engine mount was in very bad condition and the rubber vibration compound had started to separate from the metal support.
The attached photos show the use of the football to support the engine and the reason you should inspect your engine mounts and look at replacing them if in doubt.
They have a very good Youtube video on how to install the mounts in a confined engine space by supporting the engine and unbolting the engine mount flange from the engine and replacing each engine mount one at a time.
The issue of how to support the engine when there's only a few inches underneath as clearly there would be no way to get any jack underneath or down the side of the engine. Then I came across a video showing the use of an inflated football to act as an air jack bag lift. Eureka!
So I planned on 4hrs to replace them all last Sunday. In fact it took me 7hrs to replace them including uncoupling the prop shaft and realigning it afterwards. The last engine mount on the aft port side took me 3hrs alone. The flange bolts didn't want to budge and the access was next to impossible (I'm getting to old for this contortionist crawling boat work shit!) but finally the bolts moved after I managed to get a pipe for leverage onto the end of the socket rachet. Lots of bloody knuckles later all the mounts were replaced and shaft realigned. The last engine mount was in very bad condition and the rubber vibration compound had started to separate from the metal support.
The attached photos show the use of the football to support the engine and the reason you should inspect your engine mounts and look at replacing them if in doubt.