We have an H41 DS with a 4JH4AE motor turning the prop through a KM35A marine gear. Manual doesn’t list this particular engine/gear box combination but does say to check the gear oil by removing, wiping and then fully reinserting the dip stick to determine the oil level. Question - do you screw the dipstick in to fully seat it or do you just rest it on top of the housing to determine the correct oil level?