Sashap
Petty Officer 2nd Class
- Joined
- May 1, 2016
- Messages
- 145
1978 Johnson 70.
120 compression on all 3.
new everything electrical or replaced with good used. Perfect prop with correct pitch.
New fuel lines from tank to carbs. All tight. New fuel pump. New fuel. New gaskets the exhaust plate assembly. New head. New head gasket. New plugs. Plugs nice toasty Color. Dry. No issues there. Pump bulb on load and no difference. Choke on load no different. New carb needles. Cleaned carbs thoroughly 5 times. Checked flywheel in good condition. Checked magnets. Replaced stator. Tried 3 different power packs. New Sierra style coils and new wires. Idles and starts great. No misses on load . Just no power . No Tach but rpm sort of around 2000 by the sound. Same engine as ever on this boat and correct size. Bought non working. New rectifier. Saw fuel coming from high speed jets on load. Put hand over carbs on load and died Down as expected. Timing on load 19-20. Tdc on idle. All linkages work as expected. No Dva meter but tested what I could with regular meter and within spec on ohms. Spark gap test at 3/4" way past 7/16" and strong. Carb butterflies work as designed. All wires placed correctly and redone many times. Wire insulation all good. No shorts or faulty grounds.
Wtf?
please help.
120 compression on all 3.
new everything electrical or replaced with good used. Perfect prop with correct pitch.
New fuel lines from tank to carbs. All tight. New fuel pump. New fuel. New gaskets the exhaust plate assembly. New head. New head gasket. New plugs. Plugs nice toasty Color. Dry. No issues there. Pump bulb on load and no difference. Choke on load no different. New carb needles. Cleaned carbs thoroughly 5 times. Checked flywheel in good condition. Checked magnets. Replaced stator. Tried 3 different power packs. New Sierra style coils and new wires. Idles and starts great. No misses on load . Just no power . No Tach but rpm sort of around 2000 by the sound. Same engine as ever on this boat and correct size. Bought non working. New rectifier. Saw fuel coming from high speed jets on load. Put hand over carbs on load and died Down as expected. Timing on load 19-20. Tdc on idle. All linkages work as expected. No Dva meter but tested what I could with regular meter and within spec on ohms. Spark gap test at 3/4" way past 7/16" and strong. Carb butterflies work as designed. All wires placed correctly and redone many times. Wire insulation all good. No shorts or faulty grounds.
Wtf?
please help.