Help ..what's the pressure on johnson 225 year 1987??

[cowboi38]

Please let me now the pressure on the johnson 225 the year is 1987...i will test sun thanks for helping

 

[NHGuy]

Re: Help ..what's the pressure on johnson 225 year 1987??

What pressure, fuel, cooling water, oil?

 

[roscoe]

Re: Help ..what's the pressure on johnson 225 year 1987??

cylinder compression ????
What do you mean by "pressure" ?

 

[cowboi38]

Re: Help ..what's the pressure on johnson 225 year 1987??

Yes ..what's is the cylinder compression on .225 johnson 1987...
And the cylinder compression on mercury 200 1993?? Thanks for helping leo

 

[cr2k]

Re: Help ..what's the pressure on johnson 225 year 1987??

That would be the amount of pressure read on a compression gauge, taken by turning the engine over at WOT at least 5 times. Ignition disabled.

What is the range? under 100 is not good. On a new engine you would probably see pressures in the range of 110 to 130 depending on the engine. An older engine in great shape would probably have higher numbers then a newer one, because gas was better back then and higher compression ratios were more common.

The important thing is that they are very close. the lowest should be within 10% or less of the highest.

 

[JB]

Re: Help ..what's the pressure on johnson 225 year 1987??

First, let's get you out of the "not engine topics" forum and into the Johnson Evinrude outboard Forum.

When you get there, read the article on compression testing in the Top Secret file at the top of the forum.