New to the forum hopefully I'm posting in the correct place.. Just picked up a non-running Grizzly 350 as a project. Was told it ran 4-6 month ago but wouldn't fire after sitting (I'm thinking not). Anyhow it has fuel and spark and no start even on starting fluid. Decided to check compression (should have done this first) and its 30psi. Is there anything that could cause this other than needing a rebuild, or do I need to get a cylinder/top end kit off amazon a service manual and go for it? Any thoughts/suggestions would be appreciated. I'm pretty good with carbs and other external small engine issues, but rarely get into the internals.