model # and serial # again...

[weltaned]

OK one more time... I'm new to this forum.... so please bare with me. I have a Johnson 10 hp, the model # QD-22 and the serial # 2154246 and need to know the year and model. Thats the first question... now the more important one. There is a 4'' inspection hole on the (looking from the back of the engine) right hand side. It's about 4" long and has two threaded holes to mount a plate. The motor runs great... pretty clean and starts all the time (3rd pull when cold and 1st pull when hot)I got handy and fashioned a cover plate and closed the whole and the exhaust got quieter but the water stopped pumping out the blowhole ( I shut the motor right down) so, I took the plate off and low and behold I started it and the water pumped like crazy.... so tell me what is the hole for?????

 

[Paul Moir]

Re: model # and serial # again...

Welcome to Iboats, Weltaned!<br /><br />For starters:<br />Johnson QD-22:<br />Year: 1961<br />HP: 10<br />WOT RPMS: 4500<br />Displacement: 16.6 cubic inches<br />Cylinders: 2<br />Weight: 70 lbs<br />Gearcase ratio: 13:23<br />Spark plugs: Champion J4C gapped at .030"<br />Lower unit oil: OMC/BRP 'HiVis' or equivelant 90 weight outboard gearcase oil<br />Fuel/Oil mix: 24:1 87 octane gas to TC-W3 rated outboard oil<br /> '61 Catalog<br />From the Old OMC Site <br />'58 10hp Evinrude site.<br /> <br />Ok, now you want to know about that long plate that's just above the cavitation plate? There is supposed to be a cover there. That passage allows water from the water pickup (directly behind the prop) up into the water pump. You can see it pretty well in this picture of an evinrude:<br />Click here. Or here Or here. <br />As you can see, it has a few holes in it. That is to allow excess water that's been shoved into it at high RPMs by the propeller to bleed off. <br />Since putting a cover over it kept the pump from pumping, there must be something obstructing the water inlet. It should just have a screen over it.<br />If you run the engine without that plate in place, it will not get enough cooling water at speed.<br />Hope this helps!<br /><br />EDIT: Ooops! Somehow I read 'Left Hand Side'. <br />That window is there so you can disconnect the shift linkage behind it. The cover that goes over it is simply that - a cover. If putting the cover on caused it not to pump water, then either you didn't have it in water deep enough (it must be over the seam between the lower unit and midsection) or your water pump is just about worn out. No big deal since they're to be replaced every couple years and only cost a few dollars. You can do it yourself with a service manual and some simple tools.

 

[JB]

Re: model # and serial # again...

I am curious about the "one more time", weltaned. It sounds like a mild complaint that you didn't get answers to a previous post.<br /><br />The above is your first post on this board as weltaned. Did you post before under a different screen name? Where did you put it?<br /><br />I would be shocked and amazed if a post asking for data on a QD Johnny failed to get a prompt and detailed response.

 

[roscoe]

Re: model # and serial # again...

JB, I think he meant, "One more time with the most common question, what year is my motor?" <br /><br />Why didn't the manufacturers just put the date of production on the motor? Something so simple, yet apparently a foreign concept to so many corporate types.

 

[Paul Moir]

Re: model # and serial # again...

Johnson had a moment of clarity from 1969 to 1979. 6RL73 would be a 6hp, rope start, longshaft, 1973 engine. I guess OMC found they had an allergy to common sense and went back to obfusticating it in 1980. The 70s J/E nameplates seem to fall off more than any other time, perhaps that was the cause.