It sometimes doesn't take much to make me happy; like rediscovering that my 500-hour valve clearance check on my Onan generator is done at room temperature. A nice thing for this hot and humid time of year. Now to get the ER cooled down - got hatches open and ACs blowing. Main engines valve checks, done at warmed engine temp, are definitely done in cooler months. Rich Gano Calypso (GB42 Hull # 295) Panama City area, FL