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Read articles →An owner-shot walkthrough of a coolant flush on a Yanmar SA324, filmed while actually doing the job past its service interval. It covers locating the tucked-away drain plug, pulling the cotter-pin metal plug, using a battery-powered transfer pump to clear the expansion tank, and refilling with the dealer-sourced YG30 red coolant. Most useful to SA324 owners tackling this maintenance for the first time.
An owner-operator documenting their own overdue maintenance, so expect candid real-world perspective with no apparent commercial angle.
It's right under the lower radiator connection point, tucked up under there behind a spring clamp, held in with a metal plug and cotter pin.
The owner used a Harbor Freight battery powered transfer pump to drain the overflow or expansion tank, which worked despite doubts it would.
According to the manual, the correct coolant is YG30, which the owner picked up from the dealership. It is red, while the old coolant drained out green.
The maintenance guide says every two years. The owner in the video was thirteen months overdue, having gone three years and one month.
