Sea Rider
Supreme Mariner
- Joined
- Sep 20, 2008
- Messages
- 12,345
Currently servicing a Tohatsu M18 motor which has been excessively fingered by shade tree pseudo mechanics with no avail and under fully recovery on my side.
What find strange : The motor has been run less that 200 hours, both cylinders outputs 100 PSI, when the motor is rope cranked there's a slight restriction feel on the flywhee/pistons which doesn't rotate smooth even whereas my 18 motor with 1K run hours and an output of near 120 PSI achieves an even smooth rotation of such parts when the motor is rope cranked.
This 2 stroke motor was usually run at non plane speed for tender/transport use, with way off carb/timing advance, colder heat range spark plugs than the factory calls for, missing thermo and with excessive oil amount content far from ideal 50:1 fuel/oil mixture. I'm right to assume that the piston rings have already collected an excessive carbon build up on them due to the latter ?
Once al the electric components have been fully checked with instruments, new thermo installed plan starting the motor and once sufficiently warmed up squirt an overdose application of CRC Power Tuner Carbon Remover. Hope this golden product in a can restores the cranking smoothness, fingers crossed...
Happy Boating
What find strange : The motor has been run less that 200 hours, both cylinders outputs 100 PSI, when the motor is rope cranked there's a slight restriction feel on the flywhee/pistons which doesn't rotate smooth even whereas my 18 motor with 1K run hours and an output of near 120 PSI achieves an even smooth rotation of such parts when the motor is rope cranked.
This 2 stroke motor was usually run at non plane speed for tender/transport use, with way off carb/timing advance, colder heat range spark plugs than the factory calls for, missing thermo and with excessive oil amount content far from ideal 50:1 fuel/oil mixture. I'm right to assume that the piston rings have already collected an excessive carbon build up on them due to the latter ?
Once al the electric components have been fully checked with instruments, new thermo installed plan starting the motor and once sufficiently warmed up squirt an overdose application of CRC Power Tuner Carbon Remover. Hope this golden product in a can restores the cranking smoothness, fingers crossed...
Happy Boating
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