1980 family fisherman repower

[Capt. Bob]

Just to add to that history, looping the charge (via port shaping) also allowed the deflector dome Dave mentioned on the top of the piston, to be greatly reduced in size and reshaped. This in turn reduced the piston's weight and uneven heating. Coupled with a well designed expansion chamber, the tendency to burn holes in piston tops was reduced also. While outboards are water cooled most two stroked motorcycles (in my memory) were not and this was a great help in even heat distribution.

Interesting stuff and flashback inducing, to an earlier life.

Thanks Dave.

[wingtime]

I was keeping it simple but yes they are correct.  A cross flow is just that... the intake port and exhaust port are directly accross from each other and the piston top is basically flat so the intake charge can flow directly across the cylinder hence the name.  In a loop charged OMC engine I think they have three intake ports and the the intake flow is directed upwards into the cylinder by the shape of the port and the strange ramp shape on top of the piston.  When the intake charge flow nears the top of the cylinder it then loops backwards down towards the center or the combustion chamber.

Here is a great link with pictures that explains it even better:  http://www.maxrules.com/fixtheory2.html


The difference between an Ocean Runner and a Ocean Pro is basically just the sticker.  One is Johnson and the other is Evinrude.  Both of them have stainless parts instead of regular steel used in their fresh water brethren to cope with the saltwater environment.

[dburr]

Gotta love this!!        

My pleasure CB, and that is a really good  link Bruce!!    

[TheKid]

I have a 140hp 2-stroke on my 222FFV.

It works, but I would prefer a bump up to a 175 or 200hp.

Issue is weight on the back and dryness of hull.

If money were not an issue I would do a 225 Etec.

Else a DF175 for new.

Old motor....an OX66 in 200 or 225.

[3xlski]

Thanks again for all the info you are all very helpful. So I went with the 200 evinrude totally rebuilt rigged installed and a 6 month warranty $4000 can't wait to get out for some striped bass. I posted about the FF forum that was on here but I don't see it anymore does it still exist I like all the pics of other boats. Good day to all, Ted

[Capt. Bob]

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