I have water in the oil of my universal M-25xp. Ive had the engine pulled and the top half of the engine rebuilt, replaced the siphon valve,but still getting water in the oil.If anyone has any ideas pls let me know
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Raw water pump
I recently had this problem due to the heat exchanger being abour 95% clogged. This put pressure on the raw water pump, which was working fine, but all drain holes were rusted closed. The only route for the pump to relieve the pressure was back into the engine. Mine is a M25 with the "new" Sherwood pump. I found this by accident after having replaced the head gasket and trying to remove the crancase drain plug. I removed the pump for better access, still connected from the thru hull and engine, and noticed a drip between the seal and shaft. The pump works off the gears at the injector pump and that is where the water entered the engine. Check your heat exchanger, mine was clogged at the raw water inlet side and was not noticable until I removed it. A clogged mixing elbow could also have the same results. I was having steam from the exhaust and a little tempure rise at low speed. Were you having steam or little water from the exhaust? After replacing the pump, I now have more water from the exhaust than ever before.
I recently had this problem due to the heat exchanger being abour 95% clogged. This put pressure on the raw water pump, which was working fine, but all drain holes were rusted closed. The only route for the pump to relieve the pressure was back into the engine. Mine is a M25 with the "new" Sherwood pump. I found this by accident after having replaced the head gasket and trying to remove the crancase drain plug. I removed the pump for better access, still connected from the thru hull and engine, and noticed a drip between the seal and shaft. The pump works off the gears at the injector pump and that is where the water entered the engine. Check your heat exchanger, mine was clogged at the raw water inlet side and was not noticable until I removed it. A clogged mixing elbow could also have the same results. I was having steam from the exhaust and a little tempure rise at low speed. Were you having steam or little water from the exhaust? After replacing the pump, I now have more water from the exhaust than ever before.
check the sea water pump
The sea water pump on these are shaft driven as opposed to most belt driven. If the seal is damaged, water will get into the oil. It also damaged the fuel pump and had to have it rebuilt.
The sea water pump on these are shaft driven as opposed to most belt driven. If the seal is damaged, water will get into the oil. It also damaged the fuel pump and had to have it rebuilt.
Look at item 13 in the link
http://www.marinedieseldirect.com/catalogs/catalog_group.php?owner=mdd&page_ident=200142-58&model=M-25%20/%20M-25XP%20/%20M-25XPA&manufacturer=Universal&title=Sherwood%20Water%20Pump%20-%20New%20-%20302648&quant_position=&catalog=200142&printparts=200142&printservice=200151&printoperators=200157&comment1=This%20pump%20is%20no%20longer%20available%20as%20a%20complete%20stand%20alone%20pump%20unit%20(302648%20-%20NLA).%20%20Use%20this%20diagram%20to%20order%20replacement%20parts%20for%20this%20pump.%20%20To%20replace%20this%20pump,%20order%20kit%20number%20302837(kit%20includes%20a%20replacement%20pump). These are the seals that keep the water and oil separated. The guys are right, take your raw water pump off and replace the seals. This website (marinedieseldirect) has the two Sherwood and one Oberdorfer pump on it, and the seals are slightly different depending on your pump (same engine).
http://www.marinedieseldirect.com/catalogs/catalog_group.php?owner=mdd&page_ident=200142-58&model=M-25%20/%20M-25XP%20/%20M-25XPA&manufacturer=Universal&title=Sherwood%20Water%20Pump%20-%20New%20-%20302648&quant_position=&catalog=200142&printparts=200142&printservice=200151&printoperators=200157&comment1=This%20pump%20is%20no%20longer%20available%20as%20a%20complete%20stand%20alone%20pump%20unit%20(302648%20-%20NLA).%20%20Use%20this%20diagram%20to%20order%20replacement%20parts%20for%20this%20pump.%20%20To%20replace%20this%20pump,%20order%20kit%20number%20302837(kit%20includes%20a%20replacement%20pump). These are the seals that keep the water and oil separated. The guys are right, take your raw water pump off and replace the seals. This website (marinedieseldirect) has the two Sherwood and one Oberdorfer pump on it, and the seals are slightly different depending on your pump (same engine).
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