Changing the oil for the first time on my 2005 FX HO waverrunner. I was only able to extract a comblined 1 qt and 23 oz from the tank and the oil filter. Obviously some of it spilled into the hull when removing the filter, but I was anticipating getting more like 2.2 -2.5 qts as described in some of the online specs. I warmed the engine as I was told to do for about 5 mins on a water hose prior to oil change. Is this common or do I need to figure out how to get more of the oil out? Also, is there a good online source that describes the maintenance procedures for this model ski?