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mr1 engine

  1. 305SX230

    MR1 engine overheating only when underway.

    Hi everyone, I could use some advice. I have an 04 SX230 with the MR1 engines. About 2 months back, I took the boat out, and the starboard motor overheated. I looked over, and water was coming out of both of the spouts at the same rate. When I got home, I ran it on the hole, and it would not...
  2. C

    MR1 Engine Replacement

    Hello all, I recently acquired two 2005 Yamaha FX Cruisers both with less than 100 engine hours, however one of them has a hole in the engine. They appear to come with the MR1 Engines. I am new to this world, even as I have mechanical background in car/truck/heavy equipment engines. I am...
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