purekgw Posted August 21, 2015 Report Share Posted August 21, 2015 I know a couple guys on here must know somthing about these older motors, i just picked up a 73 25hp and after the first run the motor would cut out and often die after running wide open for 3-5 min. After taking off the cover i noticed coil packs had cracks so i replaced both, i also just replaced thermostat and impeller but it doesnt seem to have any water coming out the exhaust outlet/ water outlet? any ideas? Link to comment Share on other sites More sharing options...
Freshtrax Posted August 21, 2015 Report Share Posted August 21, 2015 to confirm no water out the pee hole? Make some trimmer wire from your weed wacker and poke up there. Is this a new to you motor. When was it last running? Fuel bulb hard or soft when it dies. That will get us started. Link to comment Share on other sites More sharing options...
sauce Posted August 21, 2015 Report Share Posted August 21, 2015 Does it start and idle without a lot of choke manipulation? Can you troll with it at idle speed? Are the results the same after replacing coil packs? Do you start it and have to give it throttle to keep it running? The fact that it turns over is good. Just need to invest a little more time and you can probably have it running like a top. Link to comment Share on other sites More sharing options...
dave524 Posted August 21, 2015 Report Share Posted August 21, 2015 Not sure if there was a peehole hole in 73, think it was a a pair of exhaust relief holes at the the top/back of the lower end and a water/exhaust mix came out there. Link to comment Share on other sites More sharing options...
purekgw Posted August 31, 2015 Author Report Share Posted August 31, 2015 sorry for the very late responce just got back from out east. So after doing the thermostat and impeller took it out today wa running nice and cool but now i wonna say its not getting enough gas through it, started running really rough and wanting to die at idle to 1/4 throttle. Link to comment Share on other sites More sharing options...
Freshtrax Posted August 31, 2015 Report Share Posted August 31, 2015 Is this a new to you motor? Link to comment Share on other sites More sharing options...
purekgw Posted August 31, 2015 Author Report Share Posted August 31, 2015 yes i picked it up a couple weeks ago Link to comment Share on other sites More sharing options...
Freshtrax Posted August 31, 2015 Report Share Posted August 31, 2015 (edited) I would recommend a carb cleaning. If you have never done it before it can be intimidating but ask someone to come help who has done it before it's not hard at all I do my sled in 20 min every fall. You could try seafoam but with an unknown motor carb clean is the way to go. Edited August 31, 2015 by Freshtrax Link to comment Share on other sites More sharing options...
purekgw Posted September 17, 2015 Author Report Share Posted September 17, 2015 i got the motor finaly running nice (learning experience). Now i just have to do slight adjustments to slow speed needle but i am missing the contols that lead to it, does any one have a motor that they can take pics of so i can try and make something up? Link to comment Share on other sites More sharing options...
Gallie Posted September 17, 2015 Report Share Posted September 17, 2015 My buddy has an early 70s johnson 25, im not sure how close they are but i couldt try get a pic. Link to comment Share on other sites More sharing options...
Old Ironmaker Posted September 17, 2015 Report Share Posted September 17, 2015 If you want to take a ride to south of Cayuga we can take a look at it but not for 2 weeks as we are away for 2 weeks. PM me. Link to comment Share on other sites More sharing options...
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