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  1. K

    85 Yamaha overheating

    I have a 85 Yamaha that is overheating. The engine was built in 1991. The ports in the engine are clogged with salt etc. like cement. The engine only overheats in the middle of summer. I changed the water pump and thermostats at the end of last summer. No problems last winter. The water is now...
  2. K

    85 Yamaha overheating

    I removed my thermostat to help prevent a overheating problem. I have a 91 model, 85 yamaha outboard. I know the best thing to do is remove the exhaust manifold and clean out all the deposits but I am afraid of breaking a bolt in the head. Will removing the thermostat cause me any problems?
  3. K

    85 Yamaha overheating

    I have a 92 model 85hp Yamaha outboard. It has never been in the shop. It's in great shape. While running at 4800 rpm's my horn went off and the engine started to shutdown. I pulled back the stick and shutdown the engine. Checked the lower unit but no bags etc. I was in deep water. Started the...
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