I need to replace a cylinder in a 115 Johnson v4. Does anyone have some suggestions on where the best place to get good internal parts, gasket sets, etc. for a good price? Maybe a link?<br /><br />Also, any of the veteran mechanics have any opinions against replacing only one piston? Everyone says it is acceptible to do this, however, one would think it would throw off the balance of the engine and therfore wear out the main bearing.