Brad, I bought 1985 M-15 # 335 when it was new, and also have the chunks of stryrofoam in the forward hatch, which I understand are there for floataion, but have never swamped the boat for the acid test, and have not developed any odor. I think if you need to replace those you have, do replace them for flotation, and be careful about any water getting into the cabin because it will leak into the compartment. Steve M-15 # 335 -----Original Message----- From: Bruce Chmieleski Sent: Tuesday, September 4, 2018 8:31 AM To: montgomery_boats@mailman.xmission.com Subject: M_Boats: Styrofoam below Hi Folks, I am now a M15 owner (1986 #365) and have been going about cleaning, replacing, etc. There are double-fist-sized chunks of styrofoam crammed in the forward hatch and some larger pieces aft under the cockpit. Are these part of the normal floatation for this craft? They are a bit odorous so I would either replace or remove. Thanks for any helpful info for either solution on this topic. Bruce Chmieleski Vacaville, CA Sent by mental telepathy!