alldodge, I enjoy exposing vulnerabilities in objects because people who purchase a product deserve to know the weakness of the product when they put their hard earned money into a brand name item who in the past has had a fairly spotless record of selling a product that is known for it's...
I have a problem with my 2017 MFS40A crankshaft excessive end play. Tohatsu says the max is 0.020 but mine is 0.065 and has started to make contact with the Tach-Pickup under the flywheel. Why did Tohatsu make a disposable engine without a set of thrust bearings for the crankshaft like the...
Update:
After a week of being in bed due to a stomach virus,
I was able to finally get out of the house and run the
Starbrite De-Scaler through this motor.
I took off the gearcase and hooked the submersible
pump directly to the water inlet pipe.
Loaded the barrel with a 1 to 1 solution and...
Sea Rider,
I have no intention of operating it without a thermostat.
As far as the previous operating conditions:
The power head ( I Replaced The Original ) came from the Galveston
Texas area and that's predominately salt water.
I took off the lower unit off & thermostat and hooked a
20GPM...
Yes, there is sufficient water when I connect the hose directly to the supply tube and there is little to no resistance if I blow in the hose. However, when I ran it after about 10 minutes up the river I pulled the cowl and the head felt warmer than normal. I just wanted to eliminate the...
This old frame is the 1993 25 Mega which is the carburetor'd de-tuned 40 for the 25 HP restrictions back in the day. The hole in the picture above emits almost half of what the pump puts out. Now that I put it on the water ( Ran it ) and then came home and did the trick with the rubber hose &...
The parts came in and before I put them on I ran the 3/16 hose through the lower pump housing all the way to the screen(s) and no obstruction. Then I installed the new upper housing ( 3T5650160 ) and the new pump kit ( 3T5873222 ). But before I put the lower unit back on - I used the same piece...
In the diagram that Paul posted - Is the pipe ( #30 )
loose where it connects to the lower engine base?
Or are you saying that your motor doesn't have the
Water Pipe Seal ( #31 ) and the Collar ( #32 ) ?
Because the Collar ( #33 ) is the seal between the
Water Pump Seal Lower ( #29 ) and the...
Paul, Thank You For Correcting my previous statement.
The parts may not yet be superseded by the new numbers.
The 1992 - 2002 NS & M 40/50 and a few other later 2 stroke
models use the 3C8873221 pump kit & 3C8560161 housing.
However, the 3T5873222 pump kit & 3T5650160 housing
are factory parts...
There is no " Seal " where the driveshaft goes through the upper housing.
I am now hunting down a new upper pump case and water pump kit.
It seems that there are a huge amount of parts from Japan that are on back order and these 2 items that have been superseded by new part numbers are in scarce...
I did as you suggested by using a piece of rubber hose pushed onto the driveshaft and using a drill bit with duct tape holding the drill bit. Then using a high speed drill on the drill bit I turned the driveshaft CW with the lower unit submerged in water. Most of the pressure generated by the...
The hole I am trying to describe is on the mid section casting where the 2 halves are fused, just above the lower motor mounts. This picture might be easier to understand
I added the Water Pipe Rubber Lock and there was no difference.
I am now going to replace the Upper Case and a complete water pump kit.
I am now guessing that the source of the water is coming from where the Upper Case goes over the driveshaft.
I will report back
Thank You Sea Rider for responding.
The picture above is a small hole in the casting of the mid section on the front and just above the lower engine mount. The compartment that the water appears to be coming from is where the gear shift runs vertically and also where the water pump is on the...
I am getting an unusual amount of water coming from the hole in the mid section shown in the picture and low water pressure from the tattle tail. I had ran through some shallow water and I assumed that I had picked up something so I got towed back to the launch. When I got home I pulled the...
