I am new to the posting, but have been reading the forums for a couple of years. What a great site to share information. I am rebuilding a 5.7 Mercruiser which is around a 1987 with a Bravo 2 stern drive. The boat is a 1990. My thermostat housing was badly rusted. I purchased a new thermostat housing which is a newer styled. From what I am told it is the replacement style for the style that was on it as the original style was causing a lot of problems.
The original one that was on it was a single piece unit with 6 hoses. Two of them had check balls with a spring. The replacement unit has the same amount of hose attachment points but it is a two piece unit. I believe the comparible Mercruiser p/n to the replacement one I have is 87290A23. My problem is that the engine water pump has a hose fitting at the 12 o'clock position which hits the housing and prevents the housing from sitting flat. The original housing did not stick out so far forward allowing clearance for this fitting. Has anyone come across this problem and what is the solution?
Second part of the question which may sound kind of dumb, but the fitting at the 12 o'clock position on the water pump..what is it for and where does the hose go? I took this engine apart almost two years ago and for financial reasons took my time slowly putting it back together. I took lots of pictures and labelled almost everything, but can't find the hose that goes on this fitting.
I really appreciate any help that can be provided. Thank you muchly.