Chainplate
New member
To charge the batteries on my sailboat, I have a single-cylinder, 7-horsepower Kubota diesel driving a 150-amp Leece-Neville alternator. It works pretty well, doesn't use much fuel, even if it is on the loud side. It has slightly over 2,100 hours on it, has never overheated and gets an oil change regularly every 100 hours.
However, I seem to have developed a lot of crankcase pressure as not long ago the engine blew the dip stick out (made quite a mess but I was able to stop the engine before it lost oil pressure - it only lost about a quarter of its capacity). The engine always starts quickly and doesn't use any oil between changes.
Since the engine just has a manual throttle, I've always set it to the wide open position, as the alternator is a big load when when bulk charging the batteries. I suppose I should be reducing the RPM when the regulator goes into the absorption mode but I never have. Do you think that running the engine at full throttle with a light load has created the crankcase pressure? I'm not lazy but continuously adjusting the RPM while I'm charging the batteries isn't my idea of fun.
I'm grateful for your thoughts.
However, I seem to have developed a lot of crankcase pressure as not long ago the engine blew the dip stick out (made quite a mess but I was able to stop the engine before it lost oil pressure - it only lost about a quarter of its capacity). The engine always starts quickly and doesn't use any oil between changes.
Since the engine just has a manual throttle, I've always set it to the wide open position, as the alternator is a big load when when bulk charging the batteries. I suppose I should be reducing the RPM when the regulator goes into the absorption mode but I never have. Do you think that running the engine at full throttle with a light load has created the crankcase pressure? I'm not lazy but continuously adjusting the RPM while I'm charging the batteries isn't my idea of fun.
I'm grateful for your thoughts.