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Merc.140 Impeller fails again after 5 seamiles
Hello !
I installed a new impeller kit (upper part of pump, impeller and gaskets) on a 29 year old Mercruiser 140. The old one was burned and the engine overheated. Test by flushing the engine was good. During a test trip abuot 5 miles in the marina aerea the new impeller burned again. We used the old nuts because inch sizes are not common in Europe and must be ordered from Merc. And I remember that the long screw of the water pump did not tie (it was loose). In my opinion the impeller sucked air(or exaust gas) and overheated because the bolts were not tight enough or we put a gasket in the wrong position. The water inlet was not blocked.. Is this a common fault ? Any ideas welcome! The boat is still in its place (in the water) in Italy, we can examine it only in our next holidays in July . So I try to gather information in this group. Please excuse my bad English. Thank you! Best regards Friedrich. |
Merc.140 Impeller fails again after 5 seamiles
Get a complet waterpumo overhaul kit from Merc. with upper and lower
housings. You will get new bolts with this kit. Yes all bolts must be tight or you will suck air into system. |
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