I got an old 1970 merc 800 that I am trying to bring back to life.
I had split the case, replaced the top and bottom crank seals the cork seals on the case halves and used the correct locktite anerobic goop to seal it up. I took a real close look at the reeds,
all look ok none bent or broken but did not pull the pistons out of the bores as the compression was over 135# each and equal.
the pistions look brand new where you look at them through the exhaust
ports.
I took the exhaust cover off and cleaned out all the water passages. I did not take the water jacket cover off at the top of the cylinders. Using a strobe, timing is set at 27 deg at full advance and the throttle pick up is at 5 degrees.
I put rebuild kits in both carbs. Spark is hot and blue on all 4 plugs. Replaced the fuel pump and valves. The thing will not even cough. even if I spray gas straight into the carb throats. If I spray too much gas in, the motor starts to crank more slowly like it is locking up somehow. I feel like it is either not drawing in thorugh the carbs correctly or that the spark is out of sync. I have built several merc 650s but this is the first direct charge motor I have seen. What am I missing? I do know that my flywheel marks are not the same as the clymer manual says that I should have. I have a sinlge row of 3 dots no straight line. The dist pulley has a small arrow pointing out from the center, and a little bump on the edge of the pulley. Am I getting it right I point the arrow at the three dots right?
The top piston is at TDC and the rotor points to the #1 pug wire when the little arrow points to the three dots so I assume that this is correct
Frustrated
I had split the case, replaced the top and bottom crank seals the cork seals on the case halves and used the correct locktite anerobic goop to seal it up. I took a real close look at the reeds,
all look ok none bent or broken but did not pull the pistons out of the bores as the compression was over 135# each and equal.
the pistions look brand new where you look at them through the exhaust
ports.
I took the exhaust cover off and cleaned out all the water passages. I did not take the water jacket cover off at the top of the cylinders. Using a strobe, timing is set at 27 deg at full advance and the throttle pick up is at 5 degrees.
I put rebuild kits in both carbs. Spark is hot and blue on all 4 plugs. Replaced the fuel pump and valves. The thing will not even cough. even if I spray gas straight into the carb throats. If I spray too much gas in, the motor starts to crank more slowly like it is locking up somehow. I feel like it is either not drawing in thorugh the carbs correctly or that the spark is out of sync. I have built several merc 650s but this is the first direct charge motor I have seen. What am I missing? I do know that my flywheel marks are not the same as the clymer manual says that I should have. I have a sinlge row of 3 dots no straight line. The dist pulley has a small arrow pointing out from the center, and a little bump on the edge of the pulley. Am I getting it right I point the arrow at the three dots right?
The top piston is at TDC and the rotor points to the #1 pug wire when the little arrow points to the three dots so I assume that this is correct
Frustrated