just traded engines on my pontoon (20 ft w/ 2 lg toons) . Had a late 1980's mariner and upgraded to a rebuilt early to mid-90's mariner. It has the automix oil where my older one did not. Question concerns the "backwash" I now get splashing up thru the opening in front of the engine. From about 3/4 throttle up it keeps the engine splashed pretty good----esp the bottom half of the engine cover down. The dealer said he swapped props to one that would better suit my pontoon and it does seem to be running fine----goes about 20 mph. Only have about 3 hours on the engine now and the first two were spent breaking it in slowly-----1/2 throttle first hour then 3/4 throttle 2nd hour. Is this splashing due to slightly different engine design or prop? Do I have any concerns from this? Engine is mounted as low as it can go, but in bumpy water it still pops out sometimes now----so really don't think I can raise it any-----even if that might help. It is not a bigfoot lower unit----just standard. Thanks for any suggestions/comments. Sorry I do not know the year of the engine. I was told the lower unit was late 90"s and engine early to mid- 90's. One other question concerning the tranny. I notice a different sound on engaging it than I did on my older unit. A little more "whine" at low rpm that goes away in the mid to higher rpm range. Is this normal? Thanks a bunch!!
