Cruisers Forum

Join CruisersForum Today

Thread Tools Rate Thread Display Modes
Old 05-08-2014, 16:35   #1
Registered User
rossny's Avatar

Join Date: Sep 2010
Location: ny
Boat: ketch 46'xxxkikin hulls
Posts: 122
Images: 3
running RPM

I have a 46 foot sailboat with a new 75 HP turbo yanmar. What RPM should I run it at? How high can I go? The tach only goes to 5000. Thanks

rossny is offline   Reply With Quote
Old 05-08-2014, 16:45   #2
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Albany Ga.
Boat: Island Packet 38
Posts: 18,410
Re: running RPM

Surely it won't turn 5000?

a64pilot is offline   Reply With Quote
Old 05-08-2014, 17:42   #3
Registered User
Chuteman's Avatar

Join Date: Aug 2006
Location: Charleston, SC USA
Posts: 491
Re: running RPM

Find the Yanmar manual on the boat
If not, you can download one for your specific engine (model number should be on engine plate) - multiple sources.
It will tell you Max RPM & give running + care instructions

Rule of thumb - 80% of max is a good max to all day @ that level....although you can improve (even more) fuel efficiency by dropping it even further.

Turbos need a little extra care (cool down & "blow Out" every now & then) - sure owners will chime in

5000 - just a dial face number

Enjoy the new yacht
Chuteman is offline   Reply With Quote
Old 05-08-2014, 17:47   #4
Registered User

Join Date: Nov 2013
Location: Detroit
Boat: Tahitiana 32
Posts: 44
Re: running RPM

If it is the 4JH3-TE, it is rated at max 75 hp aat 3800 rpm, and continuous operation of 69 hp at 3700 rpm. But it will last a lot longer at 2800-3000 rpm cruising speed. You can download PDF manuals for just about everything at the Yanmar website.
georgelieber is offline   Reply With Quote


Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Drop in RPM'S IN diesel engine candycat Engines and Propulsion Systems 20 07-04-2008 00:40
pulley/rpm/math question JusDreaming Plumbing Systems and Fixtures 1 28-06-2007 06:42
Varying RPM, bad governor? s/vAngel Engines and Propulsion Systems 2 08-01-2007 14:25
Normal operating rpm Weyalan Engines and Propulsion Systems 3 19-12-2005 16:44
RPM Drop Test GordMay Construction, Maintenance & Refit 7 05-03-2005 13:51

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 15:33.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.