Marine: Boating, Sailing, PWC, GPS and Navigation - 25 hp johnson water pump replacement

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deancj
05-13-03, 04:28 PM
The mod. # is 25R70E. The water pump has not been changed in the 12 yrs. I have owned the motor. I go yrs. without running the motor at all. I cranked it yesterday. There seems to be enough water coming out the exhaust when above idle. My ? is should I be getting water out at idle? Do I need to replace it for preventive maintenance. Also is the exhaust the only place to see water? What are the procedures for changing the pump?

Thanks

BoatMech
05-17-03, 07:23 AM
water should be coming out of the port in the exhaust housing
mixed with exhaust it should be a pretty good flow, fill your
cupped palm in two to three seconds while running in a tank
or in the lake. Ususally the thermostat housing is the first
place to clean, after you ck the impeller. change the gear lube
regularly too. No adjustment on the carb, just an idle screw.
deancj
05-17-03, 10:05 AM
Thanks Boatmech,
I changed the impeller yesterday. I now have plenty of water.
I did not check the thermostat. I will do that next.
In the Mod. # 25R70E, what does the "E" indicate?

Thanks

BoatMech
05-18-03, 02:47 PM
the E should indicate that it was set up for electric starting.
congrats on the water flow.
scott
deancj
05-19-03, 06:29 AM
Thanks,
It does not have elect. start. It does have the ring gear on the flywheel. I wish it did!:(

Thanks again
evinjohnson
06-02-06, 09:16 PM
just how difficult is it to change that impeller
CC RYder
06-12-08, 03:51 PM
During that time period it means the engine was manufactured by Evinrude. Johnson built the big engines and Evinrude built the little ones.
badeyeben
06-12-08, 06:38 PM
I been to the factory. Dealer tour. They are all (Johnson & Evinrude ) made at the same time. They split off the assembly line just before paint so the Evinrude gets blue paint and Evinrude stickers. Same engines until paint. The E is for electic start set-up. Dealer may not have purchased with starter but if you wanted to upgrade it would be a simple bolt on and wiring.
CC RYder
06-13-08, 04:24 PM
I have been to the factory too. Read my post again; "during that time period..." The ones made by Johnson had a J in the model number.
I don't know what they do now but I was there during that time.