Gary, I have a rebuilt Yanmar 3QM30 in my 81 LF38. The 3QM30 has about 5 extra HP than the newer Yanmar 3YM30, but I have found that the 3QM30 had more than enough power and extra to spare. A new 3YM30 was recommended by Yanmar as a replacement a few years back when I rebuilt the 3QM30. I don’t know about the Perkins, but the Yanmar was a reasonable DIY rebuild. Mine cost under $2,000. See: http://svjohannarose.blogspot.com/search/label/EngineWork <http://svjohannarose.blogspot.com/search/label/EngineWork>
As for a prop, I have a Martec Eliptec folding propeller. It came original to me, and has been working fine. They are no longer made, but here are the marking on the prop. ELIPTEC LH18DX14P - 3" and "1-1/8” shaft. Paul - Paul E. 1981 C&C Landfall 38 S/V Johanna Rose Fort Walton Beach, FL http://svjohannarose.blogspot.com/ > On Jun 30, 2020, at 2:33 PM, cnc-list-requ...@cnc-list.com wrote: > > From: CnC-List [mailto:cnc-list-boun...@cnc-list.com > <mailto:cnc-list-boun...@cnc-list.com>] On Behalf Of Gary Niemi via CnC-List > Sent: Thursday, June 25, 2020 7:55 PM > To: cnc-list@cnc-list.com <mailto:cnc-list@cnc-list.com> > Cc: Gary Niemi > Subject: Stus-List Re-power and prop for 1981 C&C Landfall 38 > > > > We are American expatriates who have sailed our 1981 C&C Landfall 38 to New > Zealand a decade ago. It has a Perkins 4-108, which is on its last legs. It's > not particularly reliable and is having trouble with overheating in the last > few years. Also, it's very heavy and it is way too much power anyway. We're > looking to replace it with a more reliable, modern power plant. > > > > So we have a couple of questions: > > > > What is the correct power? I understand most were sold with Yanmer 30hp 3HM > or 3QM diesels. We like the idea of saving a lot of weight with a smaller > engine than the Perkins, as well as ease of access, etc. However, we'd > consider a 35 or 38 also if 30 horsepower wasn't enough power. > > > > At the same time we'll be replacing the fixed 2 blade prop with a 3 blade > feathering or folding prop, so will be looking for recommendations for that. > The current prop is totally wrong. I think it's 16x14. We never were able to > get up to the proper engine speed with the 4-108. Can you recommend > something? What have people tried? > > > > Interested in hearing others' experiences. > > > > Gary Niemi > g...@niemi.co.nz <mailto:g...@niemi.co.nz>
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