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  1. R

    Cracked Exhaust Manifolds - what else to check?

    Had an overheating issue related to a way to old impeller last weekend, and went through the lower unit replacing water pump & impeller. That issue is solved. Replaced thermostat and lower unit lube while in there. Now, I clearly have cracked exhaust manifolds from the overheating issue. I...
  2. R

    Water Pump & Impeller Replacement Question

    After reading my maintenance manual and here in iboats about replacing my impeller & water pump, I decided to take my first trip into the lower-unit of a boat. I got through the replacement last night but came away with several questions. Boat: 1990 Bayliner Capri (2050 I think?), 4.3L Merc...
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