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Overheating Issue Printed From: CorrectCraftFan.com Category: Repairs and Maintenance Forum Name: Engine Repair Forum Discription: Engine problems and solutions URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=48805 Printed Date: November-23-2024 at 2:03pm Topic: Overheating Issue Posted By: Riley Subject: Overheating Issue Date Posted: June-05-2020 at 10:52am My brother has a 1980 Century Resorter in mint condition. It has a Mercruiser 255, GM 350. It will occasionally over heat when idling. The block gets hot, but the exhaust manifolds remain cool. Bringing it up to 3000 rpm or more resolves it. There is no thermostat in the engine. What would cause that? Replies: Posted By: TRBenj Date Posted: June-05-2020 at 10:57am Air leak Posted By: Hollywood Date Posted: June-05-2020 at 1:34pm Lack of cooling water Posted By: Trader144 Date Posted: June-05-2020 at 6:34pm The rubber exhaust hoses on my 1988 Nautique burned holes in them from the hot air/lack of water due to rust accumulation in my exhaust manifolds - had to replace the hoses and cast iron mainfolds. Be careful not to get water in the engine manifold area if you take them off. My boat did skiing in the Singapore harbor, so the salt water did it.

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