nissan compression issue 2003 40 hp

[fishingjean]

I recently checked compression on my 2003 40hp. nissan 3cyl. top an bottom were 160-middle was 146, is this a problem that i need to address? thanks

 

[pvanv]

Re: nissan compression issue

Rule of thumb is that cylinders are on within 10%.
10% of 160 is 16.
16 from 160 is 144, so at 146, you are in the OK range. I would keep an eye on it.
You did not mention model; Year is unimportant. Is this an NS40D (carbs), or an NSD40 (TLDI)?

 

[fishingjean]

Re: nissan compression issue

Thanks Paul for your response, the motor is an ns40d2, i really like this motor an hope this is not a issue, Denny

 

[tohatsu_guru]

Re: nissan compression issue

That cylinder has an issue or at least had an issue. I would keep both eyes on it.