Omc Cobra Water Flow Diagram
Evinrudejohnson outboard lower units. Hi all trying to diagnose my 1993 omc cobra 43l water flow troubles.
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Omc water pump diagram omc water pump replacement omc impeller replacement omc impeller repair kits omc water pump installation omc water pump kit omc water pump impeller omc water pump housing omc water pump test omc outboard water pump repair omc impeller kit.
Omc cobra water flow diagram. 400800stringer and cobra exploded view drawings. Omc parts mercruiser outdrive online catalogs. The water pump on a omc cobra.
Omc water pump impeller diagrams impeller water pump replacement parts and repair manuals. You can order by part number avoiding the usual colorful thingy that connects the whatsit to the thingamgig. Like i said it will only work on obs and alphas.
Fresh seawater is normally drawn by a belt driven pump from a thru hull fitting in hull of boat on inboards or by water pump in stern drive through the lower unit water passages on an inboardoutboard and then exits the boat through the exhaust. There is no way a rubber impeller mounted on the engine will suck water from the lower unit like that. Click to enlarge figure 2 shows the typical enclosed cooling system.
The motor starts and runs well but no water flows thru the engine. With a garden hose the water gushes out with the boat in the waterit wont suck up waterdo seals or. Even my omc cobra wont prime in a tub because the impeller is in the upper gear housing.
Omc inboard cooling system find direct replacement water pumps thermostats impellers heat exchangers and other omc. Boat parts at go2marine. The water has to be up to the top of the outdrive for those to prime.
Need replacement in the lower unit. The third item may surprise you. How to video repair help for omc sterndrives.
Omc cobra sterndrive tech info. I took this video to show the water flow from the lower unit to the water pump impeller housing without the engine running. This is an omc cobra outdrive.
I removed the thermostat to rule out whether this could be the trouble. This makes it very convenient to order parts from a dealer. Its a booklet of exploded parts diagrams for an entire sterndrive with part numbers.
Outdrive will not pump water to the enginethe marina replaced the outdrive pump and i repaced it alsostill no water coming out of the raw water hose at the transom.
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