2007 NISSAN NSF9.8A3 (4 stroke) Compression

[jmb11]

What would be considered "Normal" compression for this motor, being that it's had moderate use ?
Thanks, Jim

 

[pvanv]

Re: 2007 NISSAN NSF9.8A3 (4 stroke) Compression

With or without the decompressor operating?
As always, the 2 cylinders must be nearly equal.

 

[jmb11]

Re: 2007 NISSAN NSF9.8A3 (4 stroke) Compression

Paul,
I don't know. I just purchased this motor and don't know much about it. I've ordered the factory service manual but haven't received it yet. What I did was remove the spark plugs and check compression in each cylinder and they were each 57 lbs. Does that sound right ?
Thanks

 

[WIMUSKY]

Re: 2007 NISSAN NSF9.8A3 (4 stroke) Compression

The decompression feature makes it easier to pull start which would give you lower readings.

Here's an owners manual. It doesn't have compression specs unfortunately:

http://www.nissanmarine.com/tech_talk/pdf_files/Nis_NSF8A3_98A3_003N11082-9.pdf

 

[pvanv]

Re: 2007 NISSAN NSF9.8A3 (4 stroke) Compression

You should be fine.

 

[jmb11]

Re: 2007 NISSAN NSF9.8A3 (4 stroke) Compression

Thanks for everybody's help.