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Repower I/O
I have a 26' Renken Classic cruiser that came from the factory in 1991
with a 5.8 liter Ford V-8 and OMC Cobra outdrive. The Y pipe developed a big hole and I was obliged to remove the engine to replace it. Now that the engine is out, I am seriously considering replacement with a small diesel like the Yanmar 2GM20C. I do not need a boat that planes as I have a smaller boat that does everything I want for skiing and fishing etc. Also, the fuel consumption of the Ford V-8 is very intimidating. I would be happier with a little Trawler-like boat for gunkholing and weekend cruising. First question is whether a 20-25 hp diesel would mate up well with my Cobra drive? Can I use the existing Cobra cooling pickups and the Cobra gear shifting mechanism? Can I feed the diesel exhaust back out the Y pipe of the Cobra/Ford system? Is there maybe a better way to go to make my cruiser into a less macho and more homey platform? All ideas and opinions are welcome and appreciated. Wayne |
Repower I/O
Something I read awhile back ... dunno if it's true ... due to the way a
diesel fires as compared to a gas engine, it would hammer your OMC (designed for a gas) apart ... ??? "wgsant" wrote in message m... I have a 26' Renken Classic cruiser that came from the factory in 1991 with a 5.8 liter Ford V-8 and OMC Cobra outdrive. The Y pipe developed a big hole and I was obliged to remove the engine to replace it. Now that the engine is out, I am seriously considering replacement with a small diesel like the Yanmar 2GM20C. I do not need a boat that planes as I have a smaller boat that does everything I want for skiing and fishing etc. Also, the fuel consumption of the Ford V-8 is very intimidating. I would be happier with a little Trawler-like boat for gunkholing and weekend cruising. First question is whether a 20-25 hp diesel would mate up well with my Cobra drive? Can I use the existing Cobra cooling pickups and the Cobra gear shifting mechanism? Can I feed the diesel exhaust back out the Y pipe of the Cobra/Ford system? Is there maybe a better way to go to make my cruiser into a less macho and more homey platform? All ideas and opinions are welcome and appreciated. Wayne |
Repower I/O
Something I read awhile back ... dunno if it's true ... due to the way a
diesel fires as compared to a gas engine, it would hammer your OMC (designed for a gas) apart ... ??? "wgsant" wrote in message m... I have a 26' Renken Classic cruiser that came from the factory in 1991 with a 5.8 liter Ford V-8 and OMC Cobra outdrive. The Y pipe developed a big hole and I was obliged to remove the engine to replace it. Now that the engine is out, I am seriously considering replacement with a small diesel like the Yanmar 2GM20C. I do not need a boat that planes as I have a smaller boat that does everything I want for skiing and fishing etc. Also, the fuel consumption of the Ford V-8 is very intimidating. I would be happier with a little Trawler-like boat for gunkholing and weekend cruising. First question is whether a 20-25 hp diesel would mate up well with my Cobra drive? Can I use the existing Cobra cooling pickups and the Cobra gear shifting mechanism? Can I feed the diesel exhaust back out the Y pipe of the Cobra/Ford system? Is there maybe a better way to go to make my cruiser into a less macho and more homey platform? All ideas and opinions are welcome and appreciated. Wayne |
Repower I/O
In article ,
(wgsant) wrote: I have a 26' Renken Classic cruiser that came from the factory in 1991 with a 5.8 liter Ford V-8 and OMC Cobra outdrive. The Y pipe developed a big hole and I was obliged to remove the engine to replace it. Now that the engine is out, I am seriously considering replacement with a small diesel like the Yanmar 2GM20C. I do not need a boat that planes as I have a smaller boat that does everything I want for skiing and fishing etc. Also, the fuel consumption of the Ford V-8 is very intimidating. I would be happier with a little Trawler-like boat for gunkholing and weekend cruising. First question is whether a 20-25 hp diesel would mate up well with my Cobra drive? Can I use the existing Cobra cooling pickups and the Cobra gear shifting mechanism? Can I feed the diesel exhaust back out the Y pipe of the Cobra/Ford system? Is there maybe a better way to go to make my cruiser into a less macho and more homey platform? All ideas and opinions are welcome and appreciated. Wayne I think you'll find it would be better and cheaper to put the V8 back in and run at displacement speed. You'd have to replace pretty much everything including the fuel tank(s), engine bed, prop, shaft.... -- Jere Lull Xan-a-Deux ('73 Tanzer 28 #4 out of Tolchester, MD) Xan's Pages: http://members.dca.net/jerelull/X-Main.html Our BVI FAQs (290+ pics) http://homepage.mac.com/jerelull/BVI/ |
Repower I/O
Thanks for the comments.
Wayne |
Repower I/O
Thanks for the comments.
Wayne |
Repower I/O
I have a boat like that with a similar powertrain. I get 1.3 nautical
mpg at best on plane (20 knots) and 2.3 nmpg at best at hull speed (6 knots). I use this boat 150 to 200 hours a year (mostly at 6 knots) and buy a bit of gasoline. If/when I repower, I will probably go back to gas because the motor is so much cheaper, it will bolt right on without any modifications, it's quieter and I can buy a lot of gas for the difference in price. ($10,000) One issue for me is range, which would be better with the diesel, but I have an auxiliary tank. Capt. Jeff |
Repower I/O
I have a boat like that with a similar powertrain. I get 1.3 nautical
mpg at best on plane (20 knots) and 2.3 nmpg at best at hull speed (6 knots). I use this boat 150 to 200 hours a year (mostly at 6 knots) and buy a bit of gasoline. If/when I repower, I will probably go back to gas because the motor is so much cheaper, it will bolt right on without any modifications, it's quieter and I can buy a lot of gas for the difference in price. ($10,000) One issue for me is range, which would be better with the diesel, but I have an auxiliary tank. Capt. Jeff |
Repower I/O
"bowgus" wrote in message t.cable.rogers.com... Something I read awhile back ... dunno if it's true ... due to the way a diesel fires as compared to a gas engine, it would hammer your OMC (designed for a gas) apart ... ??? It was in response to my (exact) question that wgsant asked. It turned out that the torque of the diesel during shifting would eventually destroy the gear sets. When you shift the computer kills one side of the engine to reduce the torque and allow the gears to engage easily. It would be imposable to cause the diesel to momentarily stall during shifting. So yes you can install the diesel but it would kill the drive relatively fast. In my case I chose to build a little cash and go with the Mercruiser Diesel Sterndrive. They are a little expensive but should be a nice upgrade. Besides getting parts for the OMC will be come a issue and since the new owners of OMC (Bombardier) are known for poor quality products, it makes sense not to stick with the OMC if it is time to replace the hardware. I caught up with a guy in Mexico that had a set of diesel Merc's in his ferry and he said they have not been a problem. good luck, mark http://www.cmdmarine.com/recreationalsterndrives.html |
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