H
Hammer
Guest
First about rpm. Check carbon deposits on cylinder and exaust pipe (there are turbines in 'egg', they should rotate easy, this pipe not best for power, but have lowest noise) and correct ignition timing (3.1-2.8mm before piston up), try to run it without air filter - it may be clogged. Normal 5500-6000 rpm.
When engine run on max rpm adjust carb (2 turns of lower bolt). Engine must work clean on max rpm.
Change standart bearings with "closed" from both sides of crankcase with plastic covers insted of standart sealing rings. Its to prevent negative air flow.
Best gasoline "old" 76-92, gasoline with highter octan number will reduce power and increase overheating.
Overheating become when cylinder temperature is highter 170C. Engine may just suddenly stop. Do not let it be cold afer this, turn it several times and then wait 10 minutes. Otherwise you will may shift piston only by hammer But even after this situation engine will work fine Once i've ride with this engine with broken piston ring about 30 km on max rpm (about 7500) with tuned cylinder + wrong gazoline = detonation and for this reason overheating was occured about 5 times...
I'm not remember, but production was stopped about 10 years ago. Now plant producing gas waterpumps with this engines without clutch.
When engine run on max rpm adjust carb (2 turns of lower bolt). Engine must work clean on max rpm.
Change standart bearings with "closed" from both sides of crankcase with plastic covers insted of standart sealing rings. Its to prevent negative air flow.
Best gasoline "old" 76-92, gasoline with highter octan number will reduce power and increase overheating.
Overheating become when cylinder temperature is highter 170C. Engine may just suddenly stop. Do not let it be cold afer this, turn it several times and then wait 10 minutes. Otherwise you will may shift piston only by hammer But even after this situation engine will work fine Once i've ride with this engine with broken piston ring about 30 km on max rpm (about 7500) with tuned cylinder + wrong gazoline = detonation and for this reason overheating was occured about 5 times...
I'm not remember, but production was stopped about 10 years ago. Now plant producing gas waterpumps with this engines without clutch.
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