Picked up a 16' Alumacraft model K with a Johnson J25RERC S/N G 03572544, I bought it from an old man who just could not start it anymore, he says he bought it barely used in 95 and that it has low hours, that makes me the 3rd owner, with the exclusion of the mud dobbers it appears untouched and it still starts right up, the plugs are original, they have over spray from when the block was painted by the factory, they are worn down some, so how ever many hours it takes to wear in one set of plugs is how much time it has,
This afternoon I made a quickie stand from the plans on this forum, I simplified it and slapped it together in a hurry before thanksgiving dinner and it works great. cleaned and lubed everything, from what I can tell all I need are 2 new spark plugs, and gaskets to drain and fill the gear case, the tell-tale is strong so i don't think I need to do the water pump. what other preventative maintenance should I look into?
I have some questions My mechanical skills are strong but this is only my second boat, and the first lost a crank bearing the second time on the water,
1. air filter? My last Johnson, a 55hp from mid 70's had a plastic cover or baffle of sorts over the carb inlet, the carbs sprayed it with gas/oil and it tended to catch all the dust, this 94 25hp is just a bare carb, should there be something there? there was a good coating of oily/dusty/grime in the carb throat, I wiped it out but it leads to to wonder what the engine is eating?
2. also present on the 55 and missing on this one is a lifting ring, its doable by hand but my back would be happier getting it around with a lift, there is an open bolt hole in the block just aft of the flywheel, is that its intent? if not how is a good solid/safe way to get a sling on this thing?
3. spun prop vs aeration? on the test ride I had some oddities right as it got on plane where the motor would suddenly over rev, it was just me the fuel tank and engine on the boat and all three of us were in the back the bow was way too high, at the time I figured the prop was sucking air due to the odd angle, later I read about spun props, I took the prop off and the rubber looks ok, how would I go about determining whats going on?
4. tachometer, I have a hand head tachometer for my 2 stroke equip, but I would really like a semi-permanent tach, is there a easy way to run one on a tiller model? its a rope start and I do not have a battery on board, that may limit things.
5 I have a service manual on the way but in the mean time what is the torque for the spark plugs and the gear case drain/fill?
This afternoon I made a quickie stand from the plans on this forum, I simplified it and slapped it together in a hurry before thanksgiving dinner and it works great. cleaned and lubed everything, from what I can tell all I need are 2 new spark plugs, and gaskets to drain and fill the gear case, the tell-tale is strong so i don't think I need to do the water pump. what other preventative maintenance should I look into?
I have some questions My mechanical skills are strong but this is only my second boat, and the first lost a crank bearing the second time on the water,
1. air filter? My last Johnson, a 55hp from mid 70's had a plastic cover or baffle of sorts over the carb inlet, the carbs sprayed it with gas/oil and it tended to catch all the dust, this 94 25hp is just a bare carb, should there be something there? there was a good coating of oily/dusty/grime in the carb throat, I wiped it out but it leads to to wonder what the engine is eating?
2. also present on the 55 and missing on this one is a lifting ring, its doable by hand but my back would be happier getting it around with a lift, there is an open bolt hole in the block just aft of the flywheel, is that its intent? if not how is a good solid/safe way to get a sling on this thing?
3. spun prop vs aeration? on the test ride I had some oddities right as it got on plane where the motor would suddenly over rev, it was just me the fuel tank and engine on the boat and all three of us were in the back the bow was way too high, at the time I figured the prop was sucking air due to the odd angle, later I read about spun props, I took the prop off and the rubber looks ok, how would I go about determining whats going on?
4. tachometer, I have a hand head tachometer for my 2 stroke equip, but I would really like a semi-permanent tach, is there a easy way to run one on a tiller model? its a rope start and I do not have a battery on board, that may limit things.
5 I have a service manual on the way but in the mean time what is the torque for the spark plugs and the gear case drain/fill?