Hi All,
I have a 1991 Mariah 2000Z (open bow) with a 7.4L Mercruiser Bravo 1. We have had one successful boating trip this year, but when running on the trailer for another checkout (with muffs on, of course), no water was making it out of the engine. The first place I have checked is the hose coming from the lower unit to the water pump (merc bravos have a belt driven pump). Water will flow from this hose (by the water pump) out of the intake in the lower unit, but when I hook up the muffs and try to see water coming in, nothing...it seems that there is some blockage between the lower unit and the hose, but that it only blocks flow in one direction...
Any troubleshooting ideas? I would prefer not to have to drop the lower unit if at all possible, but it is looking like that is where the problem lies...
I haven't gotten my service manual in the mail yet, but I think i have seen that the bravos don't have a rubber impeller in the lower unit...is this the case? What else could have blocked the water flow?
Thanks for your help!
Dan
I have a 1991 Mariah 2000Z (open bow) with a 7.4L Mercruiser Bravo 1. We have had one successful boating trip this year, but when running on the trailer for another checkout (with muffs on, of course), no water was making it out of the engine. The first place I have checked is the hose coming from the lower unit to the water pump (merc bravos have a belt driven pump). Water will flow from this hose (by the water pump) out of the intake in the lower unit, but when I hook up the muffs and try to see water coming in, nothing...it seems that there is some blockage between the lower unit and the hose, but that it only blocks flow in one direction...
Any troubleshooting ideas? I would prefer not to have to drop the lower unit if at all possible, but it is looking like that is where the problem lies...
I haven't gotten my service manual in the mail yet, but I think i have seen that the bravos don't have a rubber impeller in the lower unit...is this the case? What else could have blocked the water flow?
Thanks for your help!
Dan