Motor for CD25

[Jim Shivers]

I own a 1981 CD25 on which the Johnson Sailmaster outboard motor has given up the ghost. Any suggestion for a new motor to fit the lazarette would be greatly appreciated. Thanks.



jshivers@hpnc.com

[Douglas McMullin]

This must be the most common CD25 question! My 1978 CD25 had the same Johnson engine, which I replaced last spring. I was somewhat worried about what would fit in that space, but it really was not a big deal. If you are willing to make a new wood mounting block then you can fit just about every engine up to including most 9.9's. I did look into the Honda 4 stoke 8.0. I would have liked that engine, but it would have been the hardest to fit (they will go in with some work), but the big problem was the weight. It was almost 75 pounds more that the 9.9 Mariner that I ended up with. It seemed to me that the last thing a CD25 needs is any extra weight sitting at the flat end! (also known as the non-pointy end)

I own a 1981 CD25 on which the Johnson Sailmaster outboard motor has given up the ghost. Any suggestion for a new motor to fit the lazarette would be greatly appreciated. Thanks.

dmcm@revnetx.net

[Mark]

I own a 1981 CD25 on which the Johnson Sailmaster

outboard motor has given up the ghost. Any suggestion for
a new motor to fit the lazarette would be greatly
appreciated. Thanks.

I own a 1985 Typhoon Sr. which has similiar motorwell dimensions.I just replaced my engine with a 6hp Yamaha shortshaft. After studying photos of "Grace" in drydock I tried a shortshaft with no problems. I sail in Galveston Bay. My boat weighs 3,300 lbs. and the 6 will push her to hull speed at 1/2 throttle with a dual thrust prop. Above 1/2 throttle and she produces a rolling wave to stern. The best thing was no modification was needed. I'm still
surprised at how easily "Grace" is powered by the 6 ss. The Yamaha 8hp will also fit with no modification. A good
dealer should allow you to buy an engine with exchange
privileges if one doesn't fit or perform satisfactorily. My dealer allowed me to try both the Honda 8 & 5hp 4-stroke models but both would have required modifications. I'm very satisfied with the Yamaha w/ dual thrust prop. Good Luck.



tysr@webtv.net

[MATT NIEMAN]

WHEN I PURCHASED MY CD 25 3 YEARS AGO IT ALSO HAD A
DEAD 9.9 SAILMASTER. FROM RESEARCH IN "PRACTICAL SAILOR" THE CONSUMERS REPORTS OF SAILBOATS AND ACC. VOTED THE YAMHA 6&8 THE BEST NO 4 CYCLE WEIGHT AND EXTRA PARTS TO BREAK. 100 TO 1 OIL RATIO NOT TOO SMOKEY. MINE IS A 8HP LONG SHAFT WITH A POWER PROP. ITS EVEN SLIM ENOUGH THAT YOU CAN TRUN THE MOTOR A BIT FOR THAT EXTRA LITTLE BIT OF MANUVERABILITY.

[Jim Stull]

This must be the most common CD25 question! My 1978 CD25 had the same Johnson engine, which I replaced last spring. I was somewhat worried about what would fit in that space, but it really was not a big deal. If you are willing to make a new wood mounting block then you can fit just about every engine up to including most 9.9's. I did look into the Honda 4 stoke 8.0. I would have liked that engine, but it would have been the hardest to fit (they will go in with some work), but the big problem was the weight. It was almost 75 pounds more that the 9.9 Mariner that I ended up with. It seemed to me that the last thing a CD25 needs is any extra weight sitting at the flat end! (also known as the non-pointy end)

I am not sure what the Honda 4 stroke 8 HP weighs but I recently finished installing one in my CD25. I can lift the Honda into the well without much trouble. If it weighs 75 # MORE than the Mariner 9.9 either I am ready for pro wrestling or the 9.9 weighs remarkably little!

I own a 1981 CD25 on which the Johnson Sailmaster outboard motor has given up the ghost. Any suggestion for a new motor to fit the lazarette would be greatly appreciated. Thanks.

jtstull@icubed.com

[Douglas McMullin]

That comes staight from the Honda fact sheet and my Mariner fact sheet. On average I found the Honda 8.0 is between 50 and 80 pounds heavier than a new 2 stroke 9.9. Thats just the reality of 4 stokes. Sorry.....

I am not sure what the Honda 4 stroke 8 HP weighs but I recently finished installing one in my CD25. I can lift the Honda into the well without much trouble. If it weighs 75 # MORE than the Mariner 9.9 either I am ready for pro wrestling or the 9.9 weighs remarkably little!

I own a 1981 CD25 on which the Johnson Sailmaster outboard motor has given up the ghost. Any suggestion for a new motor to fit the lazarette would be greatly appreciated. Thanks.

dmcm@revnetx.net

[Jim Stull]

Doug

Not to start a long debate but for anyone wishing to repower I think for "green" reasons (the Honda meets EPA 2006 standards), as well as other advantages the four stroke must be considered.
I pulled the Honda spec sheet out (1997 sheet M0106) and checked the weight of the 8 HP Honda. The short shaft is 77# and the long shaft version is 79#. These weights seem to jive with my lifting the motor into and out of the well.
(BTW Anyone considering repowering with a four stroke should study the info on Dana's web site (referenced else where on this website). I found Dana's photos and info a huge help in my project.) I was not able to find a Yamaha dealer close by so I had to depart fron Dana's solution for fresh air to the Honda motor.
The Honda 8 HP seemed also to be well suited to modification to admit fresh air directly to the motor. There is a removable plate on top of the motor which leads directly to the air intake system. I used a hole saw and cut a hole into this plate. The motor well cover now has a gasket on the underside which seals against this hole and feeds fresh air directly from a scoop on the cover topside. (Sort of like the old Trans-Ams with the "shaker hood".)
Regards
Jim

That comes staight from the Honda fact sheet and my Mariner fact sheet. On average I found the Honda 8.0 is between 50 and 80 pounds heavier than a new 2 stroke 9.9. Thats just the reality of 4 stokes. Sorry.....

I am not sure what the Honda 4 stroke 8 HP weighs but I recently finished installing one in my CD25. I can lift the Honda into the well without much trouble. If it weighs 75 # MORE than the Mariner 9.9 either I am ready for pro wrestling or the 9.9 weighs remarkably little!

jtstull@icubed.com

[Jim Jones]

Just looked up the weight specs on the following 9.9HP 2-strokes and the Honda 8 4-stroke.

Mercury 9.9 74lbs.
Nissan 9.8 59lbs.
Yamaha 9.9 79lbs.
Force 9.9 71lbs.
Johnson 9.9 74lbs.

Honda 8 77lbs ( for short shaft - 79lbs. for long shaft )

Be careful when looking at spec sheets now-a-days. A lot of them give the weight in kilograms rather then pounds. Under each different motor type they just show a number and you have to go all the way over to one side of the page see what units of measurement are being used.

This might explain the great weight differences you are quoting. The Yamaha at 79lbs. would only be 36kg, but 36kg subtracted from the Honda's 77lbs would indicate a weight difference of 41lbs.

If you want to see some real heavy weights, see the specs on all the new 9.9 4-strokes - most weigh in at 95lbs. to 120lbs.

Regards,

Jim Jones



jjones@intergate.com

[Stephen]

It seems I'm not the only one in the process of repowering their CD25 this season. The closest I've come to finding an outboard that fits is Johnson's 9.9 long shaft. It looks like the tiller might be able to extend into the cockpit, but I am still concerned with a proper fit.

I've looked for "Dana's website" detailing his solution to the process, but have been unable to find it. If anyone knows the url please forward it to me. I have looked at four stokes, but they don't stand a chance of squeezing into the lazarette.

Doug

Not to start a long debate but for anyone wishing to repower I think for "green" reasons (the Honda meets EPA 2006 standards), as well as other advantages the four stroke must be considered.
I pulled the Honda spec sheet out (1997 sheet M0106) and checked the weight of the 8 HP Honda. The short shaft is 77# and the long shaft version is 79#. These weights seem to jive with my lifting the motor into and out of the well.
(BTW Anyone considering repowering with a four stroke should study the info on Dana's web site (referenced else where on this website). I found Dana's photos and info a huge help in my project.) I was not able to find a Yamaha dealer close by so I had to depart fron Dana's solution for fresh air to the Honda motor.
The Honda 8 HP seemed also to be well suited to modification to admit fresh air directly to the motor. There is a removable plate on top of the motor which leads directly to the air intake system. I used a hole saw and cut a hole into this plate. The motor well cover now has a gasket on the underside which seals against this hole and feeds fresh air directly from a scoop on the cover topside. (Sort of like the old Trans-Ams with the "shaker hood".)
Regards
Jim

That comes staight from the Honda fact sheet and my Mariner fact sheet. On average I found the Honda 8.0 is between 50 and 80 pounds heavier than a new 2 stroke 9.9. Thats just the reality of 4 stokes. Sorry.....

I am not sure what the Honda 4 stroke 8 HP weighs but I recently finished installing one in my CD25. I can lift the Honda into the well without much trouble. If it weighs 75 # MORE than the Mariner 9.9 either I am ready for pro wrestling or the 9.9 weighs remarkably little!

editor@maine.rr.com

[Jim Stull]

It seems I'm not the only one in the process of repowering their CD25 this season. The closest I've come to finding an outboard that fits is Johnson's 9.9 long shaft. It looks like the tiller might be able to extend into the cockpit, but I am still concerned with a proper fit.

I've looked for "Dana's website" detailing his solution to the process, but have been unable to find it. If anyone knows the url please forward it to me. I have looked at four stokes, but they don't stand a chance of squeezing into the lazarette.

Stephen
Here is the website http://members.aol.com/darenius/CapeDory/CD26.html
You are quite correct that it requires some careful fitting to install a 4 stroke in the CD25.(At least it did in installing the HONDA!)
The approach I took was to knock together a couple of dummy mounting boards and bracket locations as required to move the motor toward the bow enough so that the motor cleared the rear of the well. When I arrived at a version I liked, the perment mounting board was made up from epoxy saturated cold molded marine plywood (per West Systems data).
BTW: If I was planning to keep my boat, before I made a decision to spend the money for a new 2 stroke or decided to go to the trouble to install a 4 stroke, I would get a feel on the way future environmental regulations are headed. I am certainly no expert in this area but extensive discussions in other boating related websites give me the sense that the future for 2 strokes will be dificult.
Another factor in my personal decision was that I wanted the additional range the 4 stroke would provide if extensive motoring was required. Obviously for day sailing this would not be an issue and the higher cost of the 4 stroke would take a long time to recoup by way of lower fuel costs.

Not to start a long debate but for anyone wishing to repower I think for "green" reasons (the Honda meets EPA 2006 standards), as well as other advantages the four stroke must be considered.
I pulled the Honda spec sheet out (1997 sheet M0106) and checked the weight of the 8 HP Honda. The short shaft is 77# and the long shaft version is 79#. These weights seem to jive with my lifting the motor into and out of the well.
(BTW Anyone considering repowering with a four stroke should study the info on Dana's web site (referenced else where on this website). I found Dana's photos and info a huge help in my project.) I was not able to find a Yamaha dealer close by so I had to depart fron Dana's solution for fresh air to the Honda motor.
The Honda 8 HP seemed also to be well suited to modification to admit fresh air directly to the motor. There is a removable plate on top of the motor which leads directly to the air intake system. I used a hole saw and cut a hole into this plate. The motor well cover now has a gasket on the underside which seals against this hole and feeds fresh air directly from a scoop on the cover topside. (Sort of like the old Trans-Ams with the "shaker hood".)
Regards
Jim

That comes staight from the Honda fact sheet and my Mariner fact sheet. On average I found the Honda 8.0 is between 50 and 80 pounds heavier than a new 2 stroke 9.9. Thats just the reality of 4 stokes. Sorry.....

jtstull@icubed.com