Re: 1987 Merc 470 Summerizing
ntheyer:<br /><br />There some things that are different with the 3.7L engine that you're beginning to learn. If the stator is not operating, or if you're not getting sufficient charging, it is more likly the water cooled voltage regulator. The stator and regulator combined are some serious loot to replace. Most of us 3.7L owners replace the charging system with conventional alternators...it is and easier repair than replacing the stator and provides far longer service and less headache, I wish I did mine 10 or 15 years ago. The conversion kit is widely available - don't pay more than $399. Search this forum for "3.7L" or go to Google and search "3.7L" you'll find lots of info. <br /><br />Also important is the lower unit impeller, it is the only raw water pump for circulating raw water into the heat exchanger. Replace every other year or 50-60 hours. You'll hear a lot of buzz about the 3.7L's poor charging, cooling and engine water pump systems, but there are reasonable options for all. The engine is easy to work on, and treated right (like any engine) it will provide lots of good times. The engine is torque monster, mines a 1989, I've replaced the stator with the alternator conversion kit (watch out if you have power steering special mount necessary) and the points with electronic ignition ($90). Do these two things as soon as possible and you'll enjoy the season. Total time and cost to do the alternator and ignition - about 4 hours and $500.<br /><br />Good luck.
