Tom,
Running a diesel like that under no-load conditions won’t help it much. Running it at the slip in gear would provide some load to the engine and be more beneficial. We usually have a 45 to 60 minute motor to the race course, which helps keep the engine in top shape. I usually set it at 2,800 rpm and keep it there. Always idle it for a few minutes before shutdown too. This will help cool down the internal parts before you shut it down. Jake Jake Brodersen C&C 35 Mk-III “Midnight Mistress” Hampton VA From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Tom Buscaglia via CnC-List Sent: Friday, October 7, 2016 13:18 To: cnc-list@cnc-list.com Cc: Tom Buscaglia <t...@sv-alera.com> Subject: Stus-List yanmar diesel The black smoke may indicate excessive carbon buildup. If you don't have three hours to run it is, next time you bring her in while the engine is still running out it in neutral and run it up to 90% of max RPM for about 5 minutes. Tom Buscaglia S/V Alera 1990 C&C 37+/40 Vashon WA P 206.463.9200 C 305.409.3660
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