Polini Cylinder Head Screws/Bolts
Posted: Wed Nov 20, 2024 9:26 pm
I was having a lot of trouble getting my 303 to start. I replaced the factory battery with one with a higher Cold Cranking Amps ratiing and that helped some.
I did note that I had a small amount of oily grey/black material along the cylinder. I thought this to be some Evans Cooling Fluid overflow from possible overfill. When cleaning this up, I found that at least one of the cylinder head nuts was only finger tight.
I torqued the nuts (13.2 ft-lbs), the screws (8.8 ft-lbs), and the spark plug (14.2 ft-lbs). This seems to really help in starting the engine.
Since I previously only ran the 303 for less than an hour total during startup and test runs, I'm assuming the screws and nuts were untorqued from the factory.
I did note that I had a small amount of oily grey/black material along the cylinder. I thought this to be some Evans Cooling Fluid overflow from possible overfill. When cleaning this up, I found that at least one of the cylinder head nuts was only finger tight.
I torqued the nuts (13.2 ft-lbs), the screws (8.8 ft-lbs), and the spark plug (14.2 ft-lbs). This seems to really help in starting the engine.
Since I previously only ran the 303 for less than an hour total during startup and test runs, I'm assuming the screws and nuts were untorqued from the factory.