Re: Fomula z 583 Jetting
Your dealer could be right. Have you had a sled with a primer before? Some sled’s engines/primers are more sensitive than others, but flooding the engine with a primer is not too difficult to do. The best way to prime a sled (if your not sure of how well your primer is working) is to lift the hood and watch the fuel flow through the primer lines. I prime it until I see a solid stream of fuel in the line, then I prime it an additional one to two times.
As far as jetting goes, the 583's are typically jetted for -15 to -20 degrees F, but I would verify it by asking your dealer and by physically checking your main jets. If this is the case, you should be able to safely down size your main jet one or two sizes (if you are completely stock). However, FYI, the main jet has very little to do with fuel flow at idle (starting). You may want to look into your pilot jet sizing and/or your needle jets to aid your low end and “start-ability”.
GL - Adam
'99 MXZ 600 & '00 5.3 Silverado