Replacing stock thermostat housing with Stainless,,,,,
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Replacing stock thermostat housing with Stainless,,,,,
I'm redoing my '87 Merc 260 setup. The stock 4 port setup seems to have a bypass to get water to the exhaust manifolds. The stainless one Sierra 18-1989 looks like it won't give any water to the manifolds until the thermostat opens. Not sure I like that with my Stainless Marine manifolds, or any for that matter.
What's everyone's set up like that has the stainless? Did a search and couldn't find anything on it.
Thanks.
What's everyone's set up like that has the stainless? Did a search and couldn't find anything on it.
Thanks.
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I did another search with different description, I found the plastic piece that comes with the housing is the bypass? It has two, which one?
Should I leave the stat out and put a restrictor in there?
Should I leave the stat out and put a restrictor in there?
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Yes, it has a bypass.
This one and install exactly how it shows you. The tstat goes on top of the plastic spacer and note the orientaion of the open area of spacer.
http://www.mercruiserparts.com/Show_...PHA+ENGINES%29
This one and install exactly how it shows you. The tstat goes on top of the plastic spacer and note the orientaion of the open area of spacer.
http://www.mercruiserparts.com/Show_...PHA+ENGINES%29
Last edited by SB; 06-23-2014 at 05:53 AM.