took my mechanics a long time to figure out my electronic choke problem was due to a sticky dirty plunger. Now fixed, the engine is still leaking water and the mechanics think it may be a faulty gasket. Not sure why they didn't locate and fix it when they changed my impeller. Taking a compression check on this engine seems to be more than these mechanics can manage. After ordering a few adapter plugs, they still had trouble screwing them into the spark plug threads. They could only give me an approximate reading of something a bit over 100. Much of these problems was due to idling the engine too long with the cooling water not circulating. My old impeller disintegrated and I had to get after them to do a better job of cleaning out the cooling system. These so called professionals charge me 118 dollars an hour. I had no choice, since they were the only ones able to remove the engine from my boat in the slip.