If you have a Yanmar 1gm10 in your boat, take note – it’s worth checking the exhaust elbow every winter for corrosion. If the internal sleeve corrodes, you’ll get hot water injected into the exhaust port on the head, which will then corrode the head into the pushrod area. Only option then is a new head. So check the elbow whenever the boat is out of the water to save you a larger bill later!

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