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1995 Yamaha 40 hp not peeing

D

dj65653

New member
New to boating and just bought an old Bass America with a 1995 Yamaha 40 hp. Put it in the lake for a test run and after a couple minutes the steady tone alarm went off and the outboard died. I suspected overheating, so I used the trolling motor to get close to the ramp and pulled the boat out.

Cleaned some mud and debris out of the tube that goes to the pee hole and verified it is clear. Hooked the muffs up to it and fired it up, no squirt from the pee hole. I am able to blow a mouthful of water easily from the top end out the intake on the lower unit.

Is there any other way I can test if the impeller is bad or just go ahead and swap it? I see kits available on Ebay and Amazon, but not sure which one I need. The outboard tag is C40PLRT if anyone can point me in the right direction for the kit I need, I would appreciate it. When I search using that number, I get different results depending on which website I check.
 
A " new to you " motor always needs a new impeller before first fishing trip.-----Too many sellers will start / run a motor dry !
 
Never owned a Yamaha but I would suggest you stick with OEM parts. Drop the lower unit, check YouTube for instructions if unsure how to do it. In a bucket submerge the lower unit entirely until an inch of the pump discharge is above water and spin the driveshaft with a drill. I used a piece of plastic tubing about 3” long that slid over the driveshaft splines and a nut driver that slide into the plastic tubing. Clamp with pipe clamps. The plastic tubing was to protect the driveshaft splines from the drill chuck. It might not be necessary to use a tube but I was nervous on messing up the splines.

Since it’s a new to you boat I would recommend replacing the entire water pump assembly then last least your starting fresh with all new components. The above procedure will give you an idea of before and after the water pump change out.

You can also rig up a garden hose to the water tube intake(situated up inside where the lower unit sat). This will test the engine cooling passages aren’t blocked. Turn the hose on gently and with a good light look way up inside the cavity where the water pickup tube joins the engine, you should see a rubber grommet where the metal water tube meets the engine. There shouldn’t be any water leaking from the grommet meets the engine. If all is fine with the cooling passages you should get water out of the telltale and water coming out the exhaust port that would normally be exiting the propeller hub. Again, I’ve never worked on a Yamaha but have done water pumps on Suzuki and Honda outboards. Both are similar so I’m ASSUMING your Yamaha will be similar.
 
William01 said:
Never owned a Yamaha but I would suggest you stick with OEM parts. Drop the lower unit, check YouTube for instructions if unsure how to do it. In a bucket submerge the lower unit entirely until an inch of the pump discharge is above water and spin the driveshaft with a drill. I used a piece of plastic tubing about 3” long that slid over the driveshaft splines and a nut driver that slide into the plastic tubing. Clamp with pipe clamps. The plastic tubing was to protect the driveshaft splines from the drill chuck. It might not be necessary to use a tube but I was nervous on messing up the splines.

Since it’s a new to you boat I would recommend replacing the entire water pump assembly then last least your starting fresh with all new components. The above procedure will give you an idea of before and after the water pump change out.

You can also rig up a garden hose to the water tube intake(situated up inside where the lower unit sat). This will test the engine cooling passages aren’t blocked. Turn the hose on gently and with a good light look way up inside the cavity where the water pickup tube joins the engine, you should see a rubber grommet where the metal water tube meets the engine. There shouldn’t be any water leaking from the grommet meets the engine. If all is fine with the cooling passages you should get water out of the telltale and water coming out the exhaust port that would normally be exiting the propeller hub. Again, I’ve never worked on a Yamaha but have done water pumps on Suzuki and Honda outboards. Both are similar so I’m ASSUMING your Yamaha will be similar.
Click to expand...
Good info, appreciate it.
 
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