10 Aug 2013 #41 charles_reed Well-Known Member Joined 29 Jun 2001 Messages 10,413 Location Home Shropshire 6/12; boat Greece 6/12 Visit site PeterBoater said: My Yanmar 4JH2-UTE manual says that for every 2 hours continuous running at below 1000 rpm, run at 2500 rpm for 1 minute. Maximum rpm on my boat is 3700 rpm. Click to expand... 1000r pm is just above tickover and really is low revs, the increase to 2500 r pm is to splash some oil up the bores.
PeterBoater said: My Yanmar 4JH2-UTE manual says that for every 2 hours continuous running at below 1000 rpm, run at 2500 rpm for 1 minute. Maximum rpm on my boat is 3700 rpm. Click to expand... 1000r pm is just above tickover and really is low revs, the increase to 2500 r pm is to splash some oil up the bores.
