I had heard you guys talking about venting the block to keep the voltage rectifier from over heating from the "air bubble" effect.<br />I talked to my Johnson mechanic. He said he has never heard of this problem from the OMC company. He said, if there was a problem, they would have sent out a bullitin to modify all engines coming in for any repairs. And, that Johnson does a lot of testing before they release a new design out into the market. In this case, a cheap modification would save them millions in warrenty repairs. He also said, if there was an air bubble, as soon as you throttle up, the bubble would dissapear.<br /><br />I did a search on this topic, and have found that "DHadley" is the only one recommending this modification.<br />I too have melted a voltage regulator, and want to get down to the bottom of this modification suggestion.<br /><br />Here is my question:<br />Has anyone had first hand information on this subject, either from OMC, or from proof of "failure mechanism" leading to the overheating of the voltage regulator?<br /><br />Remember, if you vent the top of the block, when you stop the engine, all of the water will run out of the back into the lake, leaving you with hot metal awaiting cold water to run in.
