Compression Low??

[deltaking]

89 Johnson 110HP V4: I just checked my compression because could not get the engine to start. At cold engine, it is about 90psi +/- 2 on all cylinders.

1. Is this considered low?

2. If I were to be able to start it and warm it up, would the compression change?

Most people here talk about 100-120psi. Thanks.

 

[tashasdaddy]

Re: Compression Low??

what were the other 2 ? no need stroke can be taken cold. the main thing is they are equal with in 10%.

 

[JB]

Re: Compression Low??

Your compression is fine, king.

Go to the Engine FAQs and do "Outboard won't start" to find out what is wrong.

 

[CharlieB]

Re: Compression Low??

Some engine series came with only 90 PSI compression.

Search this site for 'Won't start' or engine won't start, you should find a series of directions of how and what to check to lead you to your solution.