<div dir="ltr">Stick a small screwdriver into the hole. If it bottoms out then it does not need a plug.  If there is a cavity behind it (like a water jacket)  then you may want to plug it.  <br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Feb 1, 2021 at 7:02 PM Michael MacLean <<a href="mailto:rrengineer.mike@att.net">rrengineer.mike@att.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div><div style="font-family:times new roman,new york,times,serif;font-size:16px"><div dir="ltr">Is this hole on the rear of my BN2 engine something that is supposed to be plugged?</div><div dir="ltr">Mike MacLean<br></div></div></div>_______________________________________________<br>
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