90hp nissan question

shawpdx1

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Im going to look at a 90hp nissan guy does not know year says its metalic blue and grey on cowl says nissan anyone know about what year this could be and what its worth not running and running comes with controls
 

rogerwa

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Re: 90hp nissan question

I have an '89 that covers that color scheme. I paid $1800 two years ago in very good condition.
 

shawpdx1

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Re: 90hp nissan question

Thanks Rodger going to go look at it tonight, hopefully not a basket case
 

shawpdx1

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Re: 90hp nissan question

can anyone tell me what year this nissan is serial # looks like 3B7-1 14913
 

shawpdx1

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Re: 90hp nissan question

Mine says NS90A as well this thing is like new but center cylinder seems dead BUMMER got it for $50 with controls
 

shawpdx1

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Re: 90hp nissan question

don't know yet, need to hook it up and check but theres nothing there when I roll it with breaker bar and it rolls harder on that cylinder I was wanting to keep this one for my boat but guess it would be worth what $500 its a 92 according to Nissan dude I called
 

shawpdx1

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Re: 90hp nissan question

just looked down the cylinder and from what I can see the walls look good heres a picture of it need to decide if I want to spend the money to fix Guess all I can do is crack it open. would I be able to see the piston if I opened the exuast cover? I know you can on mercurys
 

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shawpdx1

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Re: 90hp nissan question

Any advice besides tear into it? I can tell you if feels sloppy at #2 stroke sound like a loose connecting rod? keep in mind I have no Idea of the history of this motor but there is not a rod through the block
thanks
 

pvanv

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Apr 20, 2008
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Re: 90hp nissan question

The only way to confirm whether the bearings are good will be to take it apart, and plastigage them.
 

shawpdx1

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Re: 90hp nissan question

Started tearing into it is there something out there that works well with the bolts to keep them from shearing I had 1 shear off on me on the head and I was being careful Im using WD-40 and penatrating oil
thanks
 

gdoss

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Jun 3, 2008
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Re: 90hp nissan question

I also have an NS90A. It has been running well up till last week. Checked everything today and it seem my #2 is also bad. What did you find out about this and what can I do as shade tree'er to fix?
 

pvanv

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Apr 20, 2008
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6,570
Re: 90hp nissan question

Two different motors. May be 2 different problems from the sound of it. Standard troubleshooting applies here. Check compression, fuel system (including carbs), and of course reeds.
 

gdoss

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Re: 90hp nissan question

Checked compression was 125-130 on all three. Carbs are next
 
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