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Yanmar NTS 70R

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christopherlang
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Username: christopherlang

Post Number: 1
Registered: 06-2009
Posted on Monday, June 29, 2009 - 12:17 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Hi all. I have lurked around here time and again. But, now I have a question or two.

I have a Yanmar NTS 70R engine. It's not currently in a boat, I have removed it. I am planning on using it in a 19ft workboat (displacement hull).
I was told it "was running", I see this as more of, it might/could run possibly. The engine is free, it turns over easily with the handcrank. Now, my questions are these. Is there a compression release somewhere on this engine? (It really seems to spin easily) Does anyone have any info? Owners or shop manual? Personal experience? I have seen a few old posts about this engine, but they were years ago.

I have never resurrected a diesel before. What should I be on the lookout for?
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jose carlos g.s
Visitor
Posted on Wednesday, January 12, 2011 - 05:50 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

eu tenho um motor yanmar nts-70-r ,em um barco pequeno, gostaria de saber que tipo de helice, eu posso usar no eixo desse motor;Quero saber se e por numero ou modelo?
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jose carlos g.s
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Posted on Wednesday, January 12, 2011 - 05:57 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

que tipo de helice eu posso usar em um motor yanmar nts70-r?
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john charleson
Visitor
Posted on Monday, January 24, 2011 - 05:41 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Hi.
I have a Yanmar NTS 70-R in an 18 foot sailboat which was built in the 1950's. The engine runs well but the water pump is not working. I have checked all the hoses to and from the pump and there don't appear to be any blockages. Any advice would be appreciated.
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john charleson
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Posted on Monday, January 24, 2011 - 05:44 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Hi.
I have a Yanmar NTS 70-R in an 18 foot sailboat which was built in the 1950's. The engine runs well but the water pump is not working. I have checked all the hoses to and from the pump and there don't appear to be any blockages. Any advice would be appreciated.
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andrew grinter
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Posted on Sunday, November 13, 2011 - 09:37 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

i Have a yanmar nts70 there is a decompression lever on the lhs behind the water pump (if original) it. the lever slips off the bit it turns occasionally but it is an easy fix
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andrew grinter
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Posted on Monday, November 14, 2011 - 04:23 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

i have a yanmar nts 70 motor that needs several parts. silencer, throttle springs are the main bit anyone help?
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sandyg
New member
Username: sandyg

Post Number: 1
Registered: 01-2012
Posted on Wednesday, January 25, 2012 - 05:19 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Christopher Lang I also have an old NTS70R I am missing a whole lot of parts but mostly the head. I am trying to recondition and am interested in anyone who can point me in the direction of spares or any old motors. If I could get another motor the same it would be great. Anyone interested in selling write to sandyg@gekkos.com.
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christopherlang
New member
Username: christopherlang

Post Number: 2
Registered: 06-2009
Posted on Wednesday, January 25, 2012 - 05:46 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

I have no idea where you can get parts. Sorry.
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carda
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Username: carda

Post Number: 1
Registered: 03-2012
Posted on Thursday, March 22, 2012 - 06:33 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Folks, I have rebuilt my 1965 NTS70 (happy to send pics if any interest). I created my own photo log when I striped it down and another when putting her back together. As for parts, I searched Oz and OS and all roads led to Minards Diesel in Sydney (02 4967 4444). They had all parts (main, big end, sleeve, piston, rings, valves etc) except valve springs. Only issue I have now is I can't get fuel past the fuel pump - any ideas?
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bill9295antique
New member
Username: bill9295antique

Post Number: 3
Registered: 03-2013
Posted on Saturday, October 19, 2013 - 10:20 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

i have a yanmar NTS70R marine engine i got running . but i'm not sure how the decompresion works for starting. it has on the valve cover a 1" 1/2 screw cover cap. it dosen't seem to do much. photos.
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99turbo2
New member
Username: 99turbo2

Post Number: 1
Registered: 06-2014
Posted on Sunday, June 22, 2014 - 03:18 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Re NTS Decompression: When you unscrew this screw it remains in it's position in the cover, however you can take the whole cover off. Then you reach the head including the decompression lever, which is on the same side a the waterpump. The lever is operated with another lever and on the axle of the lowest lever, there is a spring which should be in the right position to stop decompression if the upper lever is loose.

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