I have a 92 Evenrude motor, wonder how to check the compressor or RPM on the motor. Please help

Ya askin about compression ???

Yes, Opus. Do you know something about it that could help alot.

You can get ya a compression tester at harbor freight for less than $30. Whats the problem with it?

buy a commpression guage remove all spark plugs and thread the compression guage itno each cyl 1 at a time turn it over and you will get your compression reading get a spark tester as well and check your spark at the same time

it's not get on plane and the hull is always rise up really high. at first i thought it has to do with the tilt but it not. Motor seem like pushing the boat but it still running slow and it rise up the hull.

Sounds like full of water between bottom and floor

have you any new damage to prop??
also make sure you don't have anything caught between the prop and housing..

like fishing line or weeds..

there is not a single drop of water came out of the lake. Not sure with the prop.

what size motor, what size boat, make of boat. do you have a tach?

Its a 1992 Evinrude 60hp on a 16' stratos. Tach needs to be fixed.

Whenever the boat picks up speed and rpm it usually can plane easily. But sometimes it just feels like it cannot pick up any speed but pushes alot of water.

Is this a new problem with the boat, or is this a "new to you" boat and you really dont know if it ever ran well? Have you swapped props recently? Have you moved the engine mounting height recently?

You are trimmed all the way down when you take off, right?
How about weight distribution? Lots of weight in the rear of the boat?

Run it, then pull the spark plugs and tell us what you see. Rust? Even a tiny spot. Water droplets? Dry? Oil fouled? Wet Fuel fouled? Go ahead and swap them out with new ones while you have them out.

60 Hp seems to be the lower limit to push a 16 foot fiberglass boat, to me. I'm not sure you arent over propped and underpowered, but if it ran well last year, then obviously something has changed since then.

If the tach isn't working have the rectifier/voltage regulator tested...Try cleaning the carbs and have the sync/link checked...Dump all the old fuel and start with fresh fuel.. Push choke in quickly when it acts up,if the engine picks up you have a fuel problem... Check compression before spending any money...Should have ballpark 100# on each cyl.. Any thing below 90# could be a problem... Good luck ...