Bad compression 97 gsi

[soccer01982]

Poured some carb fluid in my piston when I thought fuel pump was out.. Cranked it up heard a lil pop and lil smoke came out the other piston. Only had one plug in at the time but had hose Hooke up and started flooding into the engine and carb... Took out all the water and did a dry down of the pistons and carb.. Ran compression test and 120 back end 80.. Not good!! Opened up the top and saw no damage.. I don't think it overheated a it wasn't running.. What should I be looking for and how ba is my problem??

Sent by iPhone!! Spelling sucks

 

[voodoo]

What was the compression from the last 2 or 3 tests, a lot of times people write this on the air cover to the carbs - when you do the test do it with the throttle open a little and both plugs out - spark cable clipped onto the orange holder thingy, now do the test dry and then wet, this will give indication of piston wear, water is never turned on till motor is running - the compression and many other tests can be done without water.

 

[soccer01982]

Last week I was trying to start up my ski and there didn't seem to be gas pumping into the carbs. I put a little fuel into the spark plugs and it wanted to run for a second, I then put the hose into the ski and next thing I knew there was a small pop and water began to fill into the pistons and carb. I only had one spark plug in at the time.

So I bought the compression tester and it said the 85psi in back one and 125 in front one, the last time it was tested was 12 months ago and tested at 130 in both of them.

I am currently unable to get the ski running because I can't seem to figure out why the fuel isn't pumping into the carb. So, I really have two problems. which one should I work on first?

I'm worried if I figure out the fuel problem and get it fixed and then realize that my engine is shot, I wasted my time trying to fix the fuel problem. Any advice?

Being proactive I was going to buy a MITYVAC hand pressure gauge and see if the top end was sealed. I took off the top end lid and the rings didn't seem to be damaged.

 

[voodoo]

Turning on the hose is only after having the motor run, you could have any combination of trouble with sliding/rotating parts if sitting long enough for rust to develop, the fuel could be many things but you can add supplementary fuel using a spoon of premix directly into the cyls, remove the plugs and crank the motor a few times to insure fast rotation then pour in a spoon of premix and put the plugs back in and try to get it running to clear out as much as possible dampness from inside the motor, running 3 minutes on the trailor should get you warmed up for a real compression test - ground both plug wires on the orange thingy and open the throttle a bit when cranking for the pressure test, put a spoon of oil in each hole and do it again to get a reaction of piston sealing. I do not know how a hand pressure guage will detect a top end seal, my 787 ran with 80/140 several times but no power to pull another sailer to shore - that is when I quit and found a melted top ring land and have proceeded to dismantle everything as it was a poorly maintained salt water craft and needed a lot of help but it did run fairly well.