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  1. Iroc-Sea

    Mercruiser 470 timing - service manual?

    Hey all, Removed the distributor on my Mercruiser 470 to replace the side (lifter) compartment gasket. Need to time the engine now. I believe the timing was revised to 4 BTDC vs 8 as originally specified. I think I have the gist of it but figured it would be worth reading through the...
  2. Iroc-Sea

    Deck Repair - Fiberglassing Question (Newbie)

    Hey all, working on repairing a soft spot in my deck (18’ bowrider) and the carpeting. Was thinking of cutting out the rot and using 3/4 marine ply to replace it. From what I read, I could either epoxy all sides to ‘prime it’ and glass all around (routing edges) or prime with epoxy and then...
  3. Iroc-Sea

    Lip broken off transom drain tube - options?

    Hey all, have an ‘83 Cobia Sportster, 18’ I/O bow rider. Recently found that the lip of the drain tube is broken off (see pic). I would gladly replace with a new brass tube but it’s impossible to get at the bilge side of the tube with the engine in the way. Looking for an option to...
  4. Iroc-Sea

    Mercruiser Sterndrive Transom Stress Crack

    Hey all, Have had my ‘83 Cobia Sportster for 13 years now. It has always been dry docked aside from the past 3 years, it’s been wet docked from May-October in Lake Hopatcong NJ. Overall, it’s in great shape. Always maintained, engine is strong, in process of re-upholstering the interior. I...
  5. Iroc-Sea

    Bumps in Gelcoat - blistering?

    Hey all, I have an 18’ bowrider, 1983 Cobia Sportster, have had it for the past 13 years. The past 3 seasons I’ve had it wet docked for the summer months in Lake Hopatcong NJ. I pulled it a few weeks ago but today when I washed/ waxed it, I noticed some bumps in the gel coat below the water...
  6. Iroc-Sea

    1983 Mercruiser Sterndrive - R

    Hey there - have an '83 Cobia Sportster with a Merc 470 and a R Sterndrive. Despite the reputation of the 470, the engine and boat have served me well over the past 12 years. However last season was the first year that I left it docked all season. No issues through the season - ran strong until...
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