In article ,
says...
It seems most new boats have a 160 thermostat these days. I have a '93
Mercruiser 4.3LX. Can I use the 160 thermostat? I boat exclusively in
fresh water. I want to get the cleaner combustion that the higher temps
give.

The manufacturers only distinguish between fresh and raw water cooled
engines. 140 is recommended in raw water, 160 for FWC.

jps

"Geoff 93 RRC" wrote in message
m...
It seems most new boats have a 160 thermostat these days. I have a '93
Mercruiser 4.3LX. Can I use the 160 thermostat?


You probably would not notice a difference in engine performance or
efficiency during normal boating operation. MercCruiser uses a 140 degree
thermostat in the same 4.3 engine that Volvo and the former OMC use with a
160 degree version.

Bill Grannis
service manager