alpha 1 gen 1 water pump issue

[JimboFisher]

Had my SE106 rebuilt just because. I am restoring a 1980 citation and wanted to be sure it was in perfect condition. Everything is completed but the engine overheats. I removed the 3/4 inch hose from the stern drive to the thermostat housing to see what kind of flow is coming from the stern drive impeller to the engine with ear muffs on, water on full to the muffs, and the engine running at 750 rpms. The amount of water is barely 1 gallon per minute instead of the recommended 7 to 8 1/2 gallons per minute. Where in the world could a restriction be? Could the mechanic possibly have installed the impeller pumps gaskets incorrectly? And if they are correct, then where should I go from there? HELP! I have a new pump kit for it so I am going to remove the lower gear housing today to look at the pump installation. what else should I check before reinstalling the lower gear unit?

 

[alldodge]

The pump can only supply the amount of water the muffs will supply. It will supply more with boat in the water. Turn the hose on and see how fast it fills the bucket direct from the hose

 

[crazy charlie]

Make sure impeller is in correctly.Make sure water tube from pump housing is properly seating into the water pocket in the upper.Charlie

 

[JimboFisher]

I don’t know the tube situation before I d

 

[JimboFisher]

I don’t know the tube situation before I dropped the lower unit. But everything went back together ok. I put my hose on the water tube in the upper section and it flowed freely into the bilge. I had the supply hose disconnected. My garden hose fills up a 5 gallon bucket in 35 seconds. i Haven’t connected it straight to the engine because I do not want to run the impeller without a water supply.

D it

 

[GasCan II]

Had my SE106 rebuilt just because. I am restoring a 1980 citation and wanted to be sure it was in perfect condition. Everything is completed but the engine overheats. I removed the 3/4 inch hose from the stern drive to the thermostat housing to see what kind of flow is coming from the stern drive impeller to the engine with ear muffs on, water on full to the muffs, and the engine running at 750 rpms. The amount of water is barely 1 gallon per minute instead of the recommended 7 to 8 1/2 gallons per minute. Where in the world could a restriction be? Could the mechanic possibly have installed the impeller pumps gaskets incorrectly? And if they are correct, then where should I go from there? HELP! I have a new pump kit for it so I am going to remove the lower gear housing today to look at the pump installation. what else should I check before reinstalling the lower gear unit?

If you have power steering,check the flow coming out of it,might be your problem.

 

[JimboFisher]

I found the problem. The exhaust elbow is completely plugge

 

[JimboFisher]

I finally located a new aftermarket exhaust elbow. Man are they hard to find for old bo