Educate me on lower shaft, Johnson 2 HP

[Arbe 38]

Just purchased my 1st outboard at a garage sale. Johnson Sea Horse 2HP. The serial and model # plate is missing, but when comparing it to photos I think its from the 70's. This had been unused for several years with the gas left in it and was totally gummed up. I have completely dismantled and cleaned the carb, cleaned and lubed the recoil starter, installed new plug. Now runs great, starts on 1st pull, however that's the limit of my knowledge.<br />2 questions; 1st, what should I do/check about the shaft from the engine to the prop and how do I do it? 2nd, how can I date this motor so I can find a manual? Any help appreciated...Thanks!

 

[enn]

Re: Educate me on lower shaft, Johnson 2 HP

Give us the model/serial numbers - and I will help with the production date.<br /><br />You should cehck the water pump/change the impeller in the water pump.

 

[Bear]

Re: Educate me on lower shaft, Johnson 2 HP

It's missing, right?<br />These are the possible mfg years:<br />1971 2R71 <br />1972 2R72 <br />1973 2R73 <br />1974 2R74 <br />1975 2R75 <br />1976 2R76 <br />1977 2R77 <br />1978 2R78 <br />1979 2R79 <br /><br />Check the link below for a manual.<br /><br />As it is watercooled a new impeller is #1 as well as the oil in the lower unit.<br />This is a 1971 Evinrude:<br /> http://mitglied.lycos.de/old_omc/e_1971/seite_18_19.jpg

 

[Arbe 38]

Re: Educate me on lower shaft, Johnson 2 HP

Sounds like good advice, how do I change the oil? There is a "drain" plug on the bottom of the shaft,in front of the prop. When I remove it it has a brown/gray greese like fluid which I assume is the oil you mention, but I don't see any place to fill it. <br />How do I get at the impeller to change it? I'm reluctant to start tearing things apart until I know where I'm going><br />There is a "soft plug" on the side of the block with the # 2R78P... 4822637. looks like could be a model # and part #? What do you think?<br />Thanks for the advice and prompt replies.<br />Arbe 38

 

[Bear]

Re: Educate me on lower shaft, Johnson 2 HP

Then it is a 1978. <br />The Evinrude (link to picture) is the same engine, but different colour. Just for reference.<br /><br />You found the drain and filler plug. There is one above the cavitation plate. Same size and style. IF there is another screw, smaller in size, don't touch it. <br /><br />Get new outboard gear lube and new washers for the two oil plugs.<br /><br />Hang the engine somewhere (as on the boat).<br />Fill from the lower hole.<br />When it reaches the upper, oil level hole, put the upper plug in. Then take away the lube bottle and put the lower plug in.<br /><br />To change the impeller you need a manual. I'm not sure about this model. There is no gear or neutral? Maybe it is very easy.

 

[enn]

Re: Educate me on lower shaft, Johnson 2 HP

The 2 hp only has one plug for drain/fill - take the plug out drain the oil - fill new oil in tru the same plug.