Tom, Laser-tachs can be purchased cheap ~$20 on amazon. I got a laser pyrometer as well and keep them both on the boat. They are invaluable. A hose end water flow meter was also purchased but has yet to be used.
With the laser-tach I was troubleshooting speed/rpm/smoke/prop pitch problems and needed to ensure I had accurate rpm readings. I also wanted to verify/adjust the minimum throttle setting of 800 rpm. I also confirmed the transmission ratio. CyberTech Digital Photo Laser Tachometer Non Contact RPM Tach CyberTech http://www.amazon.com/dp/B00B30FOFM/ref=cm_sw_r_udp_awd_wFtHtb14BVNXX Neewer High Accuracy IR Infrared Thermometer Non-contact Temperatur... http://www.amazon.com/dp/B004KV4DN0/ref=cm_sw_r_udp_awd_eGtHtb1ZW02CB RAINWAVE WATER TIMER .. SAVE WATER - FLOW METER by RAINWAVE http://www.amazon.com/dp/B007NHS9M4/ref=cm_sw_r_udp_awd_RGtHtb0HBX9VM Josh Muckley On May 27, 2014 8:53 PM, "Tom Buscaglia via CnC-List" <cnc-list@cnc-list.com> wrote: > Josh > > Aha...I have been wondering about the apparent inability of my 3HM35F to > run at much of anything above 3000 RPM, even in neutral. The variance from > the 20 year old analog tach would account for that. I have been running at > about 24-2600 RPM on the tach, which, if that variance from actual on mine > as it was on yours, it makes perfect sense. > > thx...I feel much better now... > > Tom B > > Tom Buscaglia > SV Alera > C&C 37+/40 > Vashon Island WA > (206) 463-9200 > www.sv-alera.com > > > At 03:49 PM 5/27/2014, you wrote: > > Message: 7 > Date: Tue, 27 May 2014 18:44:55 -0400 > From: Josh Muckley via CnC-List <cnc-list@cnc-list.com> > To: "C&C List" <cnc-list@cnc-list.com> > Subject: Re: Stus-List RPMs on Your Diesel Engine > Message-ID: > < > ca+zacrd3fh6n4s8+tew-3-1w_jga4ver9onjob1xctjjlce...@mail.gmail.com> > Content-Type: text/plain; charset="iso-8859-1" > > Yanmar 3HM35F 30hp @3200 rpm continuous. 3400rpm for 1hour. 3600rpm max. > > My manual says to avoid extended operation at high vibation rpm. The > Idle/shift/minimum rpm spec is 800. The Kanzaki transmission is required > to be shifted less than 1000rpm. > > I push it as hard and fast as I can while watching and smelling for black > smoke. The rpm by analog tach is usually 2500-2800 but by laser-tach it > usually adds about 200-400rpm. Boat speed is between 6.0-7.5kts. The > throttle lever slips a little so after extended operation the rpms creep > down and I'll have to re-throttle up. I don't worry about fuel consumption > since I don't use my 40 gallon tank fast enough anyway. > > I hate running the engine but the noise is basically the same regardless of > rpm. > > I also use a great product called Opti-lube XPD. I strongly recommend it. > It is marketed to restore the lubricity that has been lost by ultra low > sulfer diesel (ULSD). My expierience is that the engine runs smoother, min > idles a little higher and smoother, and can attain a higher rpm before > black smoke. > > My understanding with ALL diesels is that you want to run the engine near > full rpm and load as often as possible and the prop should be pitched > accordingly. > > Josh Muckley > S/V Sea Hawk > 1989 C&C 37+ > Yanmar 3HM35F > Solomons, MD > On May 27, 2014 12:16 PM, "Edd Schillay via CnC-List" < > cnc-list@cnc-list.com> wrote: > > > Listers, > > > > Curious to know what you set as your own personal Max RPMs on your diesel > > engine? The Enterprise has an Universal M35. > ...snip... > > To change your list preferences, including unsubscribing -- go bottom of > > page at: > > http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://cnc-list.com/pipermail/cnc-list_cnc-list.com/attachments/20140527/7ea8bfc4/attachment-0001.html> > > ------------------------------ > > > _______________________________________________ > This List is provided by the C&C Photo Album > > Email address: > CnC-List@cnc-list.com > To change your list preferences, including unsubscribing -- go bottom of > page at: > http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com > > >
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