[dog39108]

I have a 1988 150HP Mariner Magnum II that will not pee at an idle or at low speeds. I already replaced the water pump last year with no results.What now?

[DJ]

Did you replace just the impeller or the whole kit (housing)?

[mstrhntr]

Impeller and housing could be the problem. However you might pull off the cooling hoses and check them for corrosion build up. Ensure all fittings are also free of debris

[dog39108]

Replaced the whole kit

[moderator1]

Moving to Mercury and Mariner Questions.