QAccording to the temperature gauge, my BMC 1.5 runs at around 60-70C (except when I towed someone a couple of miles last weekend and it went up to 80C). A pal of mine who used to have a BMC 1.5 told me last night that 82C was the normal operating temperature, and we surmised that the thermostat may be stuck open?
I also intend to change the oil filter myself, I’d be grateful if you could recommend a supplier of all such parts. JULIAN NEWTON-TYERS
ATONY REPLIES: Some marinisers fit a lower temperature thermostat to their boats that use a calorifier for hot water to stop customers scalding themselves quite as badly as if an 82C thermostat were fitted.
Direct raw water cooled boats boats also use lower temperature thermostats.
You may be correct about the thermostat and you could change it if you want to as long as it is not direct cooled.
However be aware that someone may have tried to cover up an undersized skin tank problem or the like by fitting a cooler thermostat.
If the temperature rises to 60 Cover about 10 minutes of boating then the thermostat is probably working as it should but is a lower temperature one. If it take ages to rise then the thermostat. is probably stuck open.
Regarding the oil filter, I must refer you to the engine mariniser because there is a question over the type and size of oil filter. But if you know if its a “spin on” or bowl type, I think ASAP Supplies or Calcutt boats will be able to help you.
Once you have the filter part numbers any motor factors should be able to match them.