Maximum RPM'S?

[1987 175 mercury]

I am interested in finding out opinions on what the maximum rpm's I should run my engine at without possibly causing catastrophic damage?I have heard that the safe range is from 5500 rpm"s up to 6200rpm's.I have a 1987 175 mercury, the cylinders all ck out with good compression and it runs well.I have had it at 5800 rpms which is the most i could get out of it with current set up.Any special maintenace ideas on allowing it to run at higher rpm's safer.Thanks.

 

[Faztbullet]

Re: Maximum RPM'S?

OEM spec is 5300-5800rpms, anything more than 6200rpm hp drops off...

 

[1987 175 mercury]

Re: Maximum RPM'S?

Is this engine normally ran over the OEM specs of 5800 rpm's and up to 6200 rpm's.Thanks.

 

[Faztbullet]

Re: Maximum RPM'S?

Depends on driver/owner/set-up as 6000rpm will not hurt it. What will hurt it is cooling and fuel issues, there was a TSB on updating the jets on this engine along with the 200hp.

 

[Bamaman1]

Re: Maximum RPM'S?

Just make sure your cooling system and lower unit are in top notch shape if you're consistently pushing it that hard for very long.

 

[1987 175 mercury]

Re: Maximum RPM'S?

Thanks for the replies.This knowledge gained is tremendous.