Fired up the NAA after 6 months idle. Always hard to start, but tried your onesie, twosie, choke, and it fired up on second try, Thanks. Noticed Proofmeter registers 1500 rpm no matter the engine speed. Ordered new one already. Also noticed that new temp gauge won't get past line of cold and normal. Ran for 25 minutes with radiator blocked by sheet of newspaper over grill. After shutdown, gauge went smack dab in middle of normal. Should have checked t-stat BEFORE I put new fluids in, but too anxious to get it running. Now, do I have to completely drain rad and block to check and/or replace t-stat? As always, your expert advice is much appreciated by this newbie tractor guy.