Have a Yamaha '06 25hp 2 stroke. Was wanting to know if the telltale is BEFORE the cylinder/case cooling circuit or AFTER the circuit?
Basically, if I suck up a lot of mud and pack the Thermostat 'til it no longer flows, can I still get flow out the tell tale but no cooling to head?
Interestingly enough I had a nasty overheat on a 2000 Johnson 9.9hp due to just that. The telltale is before the cylinder head. I hit mud, lost telltale, got telltale back and proceeded. Then bam! Overheat. Took it apart and the Tstat was plugged with mud. So on Johnson it goes Intake-->Water pump-->exhaust cooling plate & telltale-->case-->Thermostat-->cylinder head--> case-->exhaust leg.
What does the Yamaha 25hp do? If you have a link to the cooling diagram that would be great!
Thanks!
Sandor27
Basically, if I suck up a lot of mud and pack the Thermostat 'til it no longer flows, can I still get flow out the tell tale but no cooling to head?
Interestingly enough I had a nasty overheat on a 2000 Johnson 9.9hp due to just that. The telltale is before the cylinder head. I hit mud, lost telltale, got telltale back and proceeded. Then bam! Overheat. Took it apart and the Tstat was plugged with mud. So on Johnson it goes Intake-->Water pump-->exhaust cooling plate & telltale-->case-->Thermostat-->cylinder head--> case-->exhaust leg.
What does the Yamaha 25hp do? If you have a link to the cooling diagram that would be great!
Thanks!
Sandor27