CD26/Honda 9.9 outboard installation

[Kurt Lyons]

About 5 years ago I spent the winter fabricating a very slick design for mounting a Honda 9.9 to the well of a CD26..
If anyone would like a photo of my installation I would be willing to supply one....the details are as follows
1. I moved the oak CD engine mount forward about 4" allowing the Honda to fit.
2. I re-engineered the idle relief port to keep exhaust gases out of the engine well when idling or operating the motor at slow speeds.
3. I added fresh air venting to the Honda motor cover
4. I rigged up remote controls for the shift and throttle allowing me to install a somewhat permanent bulkhead so the motor now runs in a fully enclosed well...the engine is now QUIET while motoring.





kjlgpw@aol.com

[jim stull]

About 5 years ago I spent the winter fabricating a very slick design for mounting a Honda 9.9 to the well of a CD26..
If anyone would like a photo of my installation I would be willing to supply one....the details are as follows
1. I moved the oak CD engine mount forward about 4" allowing the Honda to fit.
2. I re-engineered the idle relief port to keep exhaust gases out of the engine well when idling or operating the motor at slow speeds.
3. I added fresh air venting to the Honda motor cover
4. I rigged up remote controls for the shift and throttle allowing me to install a somewhat permanent bulkhead so the motor now runs in a fully enclosed well...the engine is now QUIET while motoring.

Kurt, do you know the function of the idle relief ports vs. the main exhust port? When I plug them with my finger it appears to make no difference in the running (at idle) but it obviously redirects more exhust to the lower ports. I purchased the Honda shop manual but can find no mention of them.
Jim



jtstull@icubed.com

[john churchill]

1. I moved the oak CD engine mount forward about 4" allowing the Honda to fit.

on my 26, i installed a 15 honda without any mount mods. was this for some other reason? did cd have different placements? how old is your engine(e.g. what color?)

3. I added fresh air venting to the Honda motor cover

i thought about doing this but was hesitant to rip into the only cover i had for it. how about more details?

thanks.
john

[jim stull]

1. I moved the oak CD engine mount forward about 4" allowing the Honda to fit.

on my 26, i installed a 15 honda without any mount mods. was this for some other reason? did cd have different placements? how old is your engine(e.g. what color?)

3. I added fresh air venting to the Honda motor cover

i thought about doing this but was hesitant to rip into the only cover i had for it. how about more details?

thanks.
john

Hi John
On my CD25, I also had to make a new mounting board to move the engine forward. Even so, I found that the engine will "move" enough on its rubber mounts so that the "fins" on the casing rub the well both in the back and the front. I have fitted these fins with split hose affixed with 5200 to prevent more wear on the well.
On my engine there is a black plastic insert fitted to the top of the cover. The Honda factory rep suggested that I cut the air intake here because if I ever wanted to sell the engine, this plate could easily be replaced.
My boat is a 1975 model and my engine is a 1998 8 hp Honda 4 stroke.
BTW I believe that there is probably quite a bit of variation in tolerance fron one "moulding" to another.
I have done a lot of modification to my boat, I have found out the hard way that the boat is not completly symetrical, port vs starboard.
For example, to balance the greater weight of the 4 cycle engine, I moved the battery from the cockpit lazzerette, forward to about the centerline of the boat. I made a mockup then molded up a case and fitted the battery. To balance the weight port to starbord I molded up a second identical case. Would not fit. Over an inch variation (in the boat). Much extra work. Found this in other areas of the boat. So I expect that the "luck off the draw" effects the ease of these "shoehorn jobs".
Jim



jtstull@icubed.com