I have a 1999 four winns horizon 190 with a volvo penta 4.3L GL engine with SX outdrive. After being on the lake for the first time this season (maybe a month ago) for 45 minutes of running solid, my boat decided not to start. and it hasnt since. The boat did not die when I hit a wake pretty good sized wake, but it did not start the next time after that happened (a few minutes after). The noise the boat was making was a grrrrrrrrrrr sound, which I believed was the starter not engaging the flywheel. After trying to tap the solenoid, we got towed in a rather short distance luckily. After reading some forums on here I concluded that the bendix might be bad. After taking the boat to a mechanic that quoted about $400 to replace the starter, I decided to purchase one off the internet and replace it myself (the mechanic separatly said the bendix is what the problem is). Replacing the starter with a new one wasn't very difficult. Then the first turn of the key made a somewhat different noise, but still did not start. The 2nd and 3rd tries sounded exactly like when i was stuck on the lake with a grrrrr sound. When I replaced the starter i did notice a few imperfections on the ring gear. I would say it was chewed up just a little (didnt look that bad). The old starter was not original (actually dated from 2009, before I owned this boat) and had a few imperfections in the cog as well. I then turned the crankshaft to see if the starter would catch a better section of the ring gear. All but one of the wheels turned when I used a wrench to turn the top right wheel, only the one on the lower left did not turn. The same grrrr noise persists. Is it possible the aftermarket starter did not work at all? Is it possible the original starter was not faulty? Am I not properly turning the crankshaft to rotate the flywheel/ring gear? I did not test my battery with a meter, but I did charge it on 12v 40amps for over an hour, and the battery isnt more than 3 yrs old. and the connections were tight. I looked through a trouble shoot posted by 'don s' but I'm not sure of what a 'good ground' is exactly, and I think replacing the starter was kind of what that trouble shoot was for anyways( which I did due to a mechanics opinoion in addition to mine.). So I am hoping that its the wiring or something else that is wrong so I dont have to lift out the engine. Please let me know what else I can check. When I took off the starter, the purple ground wire was not even connected at all. I did put it on terminal D from the troubleshoot image. There are other wires that are not connected and I suppose former mechanics (including the person who quoted me $400) might have not done things by the books. I am currently researching the best way to build an A-frame over the boat and buy a chain with a winch to haul out the motor, however I don't know what else I could do as of now other than replacing a flywheel. Please advise. Thanks this is my first thread so let me know if I could have better done it.