9.9 powerhead identification and part interchange

[morenc00]

I have a evinrude 9.9 CD ignition power head wich suffered from bad water recovery. It need crink,con rods and pistons. to find these parts I need to identify the year of my powerhead(I have heard pistons and some other parts were different from 1977-1981 and 1981-1989) is there a way to identify the year with only powerhead and cover? I have some pictures I can send.<br /><br />thanks <br />michel

 

[Paul Moir]

Re: 9.9 powerhead identification and part interchange

Check on the top of the engine for a round silver plug with numbers scribed into it. It looks like this:<br />

<br />Post the numbers you find here.<br /><br />Good luck!

 

[morenc00]

Re: 9.9 powerhead identification and part interchange

should I have 2 numbers...<br /><br />I have found one C7054227 is it ok?<br /><br />michel

 

[Paul Moir]

Re: 9.9 powerhead identification and part interchange

We hoped you would find two numbers, a model number and a serial number. Unfortunetly that's just the serial number, and there's no way to tell the year for sure with it.<br /><br />However, searching this sight finds:<br />C7031103 35hp 1979<br />C7031348 4hp 1979<br />c7035621 9.9hp 1979<br />C7040114 4hp 1979<br />C7041271 20hp 1979<br />C7050179 15hp 1979<br /><br />(Your outboard here)<br /><br />C7062530 20hp 1979<br />C7084703 7.5hp 1980<br /><br />There is nothing conclusive about the above analysis. Try to confirm this by checking for date codes on the powerpacs, etc.<br /><br />Hope this helps!

 

[BF]

Re: 9.9 powerhead identification and part interchange

I had/have a similar problem with my 15hp... the ID tag's gone, and only the serial number on the plug in the block. I think Canadian motors were stamped different than american ones. The most definative way I came up with to get the year was to watch ebay for motors like mine. Eventually I saw enough of the cowl decal styles, that I'm pretty certain mine is an '82 (+/- a year).<br /><br />I didn't think there were differences in the internals, just the electrical. Have you seen this link? <br /><br />9.9/15 hp OMC article <br /><br />good luck,<br /><br />Brent