jack daniels marine
Seaman Apprentice
- Joined
- Jun 27, 2012
- Messages
- 48
2014 Suzuki DF150
Hey folks,
There are 2 original Suzuki thermostats available for the DF150. 122 deg F and 160 deg F.
I use my boat in water temperatures down to 40 deg F in the winter and up to a max. water temp of 72 deg F in the summer.
I do only about 60hrs per season , mostly in water temperatures of 46-72 deg.
Otherwise I take a short run or two mid winter if the area is ice free just to exersize the motor.
No engine starts close to or below 32 deg F.
Which thermostat is best for my use?
The motor temp allways runs at 136 deg F with the 122deg thermostat. That's too cold for a car anyway, Is it too low for an outboard?
should I raise the operating temperature by switching to the 160 deg thermostat?
There are also 2 viscosities of motor oil to choose from prescribed by Suzuki: SAE 10w-30 and 10w-40.
I use 10w-30. These 2 viscosities are quite differant around 32-50 degrees, 10w-40 may be unnecessarily viscous for my temperature range
Worst case:
If I use the 160 thermostat, the engine temp will probably run at 175 or so. Would that cause problems , cracks due to the temperature difference mid-winter?.
175 deg cylinder head with 37 degree cooling water?
Hey folks,
There are 2 original Suzuki thermostats available for the DF150. 122 deg F and 160 deg F.
I use my boat in water temperatures down to 40 deg F in the winter and up to a max. water temp of 72 deg F in the summer.
I do only about 60hrs per season , mostly in water temperatures of 46-72 deg.
Otherwise I take a short run or two mid winter if the area is ice free just to exersize the motor.
No engine starts close to or below 32 deg F.
Which thermostat is best for my use?
The motor temp allways runs at 136 deg F with the 122deg thermostat. That's too cold for a car anyway, Is it too low for an outboard?
should I raise the operating temperature by switching to the 160 deg thermostat?
There are also 2 viscosities of motor oil to choose from prescribed by Suzuki: SAE 10w-30 and 10w-40.
I use 10w-30. These 2 viscosities are quite differant around 32-50 degrees, 10w-40 may be unnecessarily viscous for my temperature range
Worst case:
If I use the 160 thermostat, the engine temp will probably run at 175 or so. Would that cause problems , cracks due to the temperature difference mid-winter?.
175 deg cylinder head with 37 degree cooling water?
