Have Boat Questions? Ask a Boat Repair Expert.
Good morning, my name is ***** ***** am I speaking with? I read what you wrote, are you running the boat in the water or on the trailer with a garden hose adaptor?
Got it. Did you replace the thermostat as well? Can you put the boat in the water and see if it pumps water when in the water?
No, water should come out of the exhaust right away. The reason why I would have you put the boat in the water is some boats just will not pump water when running on the flushing muffs no matter what you do. Let me know if it pumps water with the boat in the water, or not, and we can take It from there.
You have to put it in the lake. What needs to happen is the displacement of the boat will push water up the sterndrive and to the impeller. With a garden hose or even a large bucket there is no water displacement.
I'm sorry I don't quite understand your last reply. Is that a questions or is that a statement?
Does the boat have a working temperature gauge and a working alarm system?
Your best bet would be to get an infra red temp gun, and then scan the temps of the thermostat housing and the exhaust risers with the engine running. Both temps should not go over 160F. If the temps do get up there, then you would need to shut it down and pull the boat back out. Click this link, this is what you would want. https://www.harborfreight.com/non-contact-infrared-thermometer-with-laser-targeting-61894.html
Okay no problem. I do need to look something up. What is the year of your Cobra drive?
Okay the next step is to remove the back cover from the sterndrive. Remove the water pump cover. Have a helper crank the engine over. Does the impeller spin when the engine cranks over?
That really depends on how much pressure your hose has. If your hose has low pressure you probably will not get any water. If you turn the hose on high, and then take the flushing muffs and squeeze them tightly by hand against the water pickups in order to minimize leakage, then you should get water up by the pump.
Okay so the impeller does spin when you crank the engine over, correct?
Got it. The impeller does have to be installed in the water pump cover in a certain direction. Click this link, is your impeller installed exactly like this? - http://forums.iboats.com/filedata/fetch?id=6964000
If the oring is falling out of place that would cause an issue as well. Are you using a new o ring or are you reusing the old o ring?
You can use a little grease or better yet permatex aviation sealer to hold that gasket in place. Was the impeller installed as shown in the picture I sent previously or was it the other way around?
Was the impeller installed as shown in the picture I sent previously or was it the other way around?
If you hold those flushing muffs tight to the lower unit do you get water out of one of the holes that is under the impeller?
If you are not getting water up to that hole then the only thing left is a clog in the outdrive. So yes the drive would need to be removed and go to a work bench to have the lower removed.
No, the drive needs to come off first before splitting the halves in two.
If I am understanding everything correctly we are not getting water from the lower unit up to the hole behind the impeller, which would indicate a clog. Is that all correct or did I miss something along the way?