Hello grumpy,
Your response quick as a flash as per usual. Thanks.
To answer your questions plus some general info -
- engine is B&S Model 44P777-0177-B1 "Intek" ELS Professional, 724 cc, 26 HP, Vee-twin
- this engine series features a larger cooling fan than the standard models
- this engine series also features an electronic fuel management system, which is supposed to monitor engine temperature, engine speed and battery voltage to adjust choke during starting and warm up. There is a dashboard-mounted manual choke control lever which must be used to start the engine, and then quickly set to off when engine starts.
- electric fuel pump appears to be required as the carburettor intake level is above the bottom of the fuel tank on this mower. (There is no wait for fuel delivery, engine start is immediate using manual choke. Also B&S guarantee fuel delivery on a 15 degree mower operating slope.)
- air cleaner foam pre-filter is a dry element, which I clean frequently in dry dusty conditions. (OEM says clean each 25 hours, and replace annually.)
- air cleaner main element is the usual dry paper type, which I clean along with the pre-cleaner. (OEM says clean and replace as for pre-filter above.)
- engine oil change is done at 6 monthly or 50 hour intervals. (OEM says every 12 months or 50 hours.)
- oil filter is changed along with engine oil, every 6 months. (OEM says every 12 months or 50 hours.)
I suspect that you are probably correct about the lean running settings by the manufacturer. I notice that very time I buy a new B&S engine the emission control regulations in California seem to have been further tightened up a notch or two.
Hope that answers your questions.
Regards,
mustang
