575 questions
 

Oil - what have you found to be the best oil and what weight


Spark plugs - what brand is best, how hot, and what gap

thanks

Can't go wrong with Mobil 1 15-50.

I would also do a search on the 575SCI blowers. There were issues with the rear bearings in some models.

Mercury Racing says to use Kendall GT1 20 W 50. They do not reccomend synthetic.

Use petroleum based gear lube in the blowers.

I've been running the stock plugs w/o problems.

Blowers are a weak link. Send them to Blower shop for a rebuild.

I use Amsoil 20-50 or Mobile one V-twin oil.

Get the MSD replacment coil - plugs right in