jhorton3
Jedi Warrior
Offline
I'm trying to start this engine for the first time since being rebuilt two years ago, but I can't get it to fire once. I've got a fresh battery installed, the starter turns the motor over OK. The fuel pump is working. I pulled the fuel hose going from the first carb to the 2nd and fuel squirted out. New spark plugs, rotor, cap, and wires. I pulled the spark plug leads to test for spark and spark looks to be OK. I've got oil pressure registering on the gauge.
I knew before I got on here that I'd probably be asked about compression readings, so I pulled out my compression gauge. I screwed it into the first cylinder, turn the engine over, no compression. Tried #4 and the needle on the gauge barely registers. Stuck my thumb over the hole for #1 and there wasn't enough pressure to [censored] past. Number 4 gives a little more. I pulled the rocker cover off to see if anything was sticking, and as far as I can tell the springs and valves are moving up and down as they should. I made an attempt to adjust the valves, but the holding nut on most is on so tight I can't budge it. Busted my hand trying.
What would cause the engine to have such low compression after the rebuild? I'm assuming that until I can get the compression up much higher I'm not going to see this engine run.
I knew before I got on here that I'd probably be asked about compression readings, so I pulled out my compression gauge. I screwed it into the first cylinder, turn the engine over, no compression. Tried #4 and the needle on the gauge barely registers. Stuck my thumb over the hole for #1 and there wasn't enough pressure to [censored] past. Number 4 gives a little more. I pulled the rocker cover off to see if anything was sticking, and as far as I can tell the springs and valves are moving up and down as they should. I made an attempt to adjust the valves, but the holding nut on most is on so tight I can't budge it. Busted my hand trying.
What would cause the engine to have such low compression after the rebuild? I'm assuming that until I can get the compression up much higher I'm not going to see this engine run.