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    Unable to remove exhaust elbow/raiser?

    Hi all. I want to replace the gasket between my intake/exhaust manifold and engine because i notice that it leaks a little bit. In order to do that, i need to remove the exhaust raiser. However, i am not able to remove it from the manifold. I feel that the raiser and the manifold are "welded"...
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    What causes this knocking tapping sound?

    Hi engine experts! I have a mercruiser 3.0 (181) that runs without any issue except a knocking/tapping sound near 1200 to 1600 rpms. As you can hear from the video, the sound is barely heard at idle. The sound become audible when I increase the throttle a little bit and barely audible at higher...
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