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post #1 of 12 Old 11-09-2013 Thread Starter
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Universal M5411 Engine 11HP

I am looking to purchase a 1980 30ft Catalina. it has an 11 HP Universal Diesel engine. The question is, do you think that 11HP is sufficient HP to move that boat against a tide or waves? Any guess as to top speed on a flat sea?
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post #2 of 12 Old 11-09-2013
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Re: Universal M5411 Engine 11HP

I have a 5411 in my Ticon 30, similar in size to the Catalina 30.
If you read HP requirements by displacement is shows under powered.
Hull speed is 6.8 kts. my top speed under power is about 6.2 (2200 rpm)and it settles in very nicely at about 5-5.5 (1900-2000 rpm).
My max RPM should be higher, I have not checked for partial blockage in the exhaust pipes or for any of the other usual suspects, maybe next season.
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post #3 of 12 Old 11-09-2013 Thread Starter
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Re: Universal M5411 Engine 11HP

thank you for the reply. it is very helpful.
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post #4 of 12 Old 11-09-2013
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Re: Universal M5411 Engine 11HP

My previous boat (Cal 9.2) had one. While a 30 footer, its lighter than the Cat30. I would guess the 5411 is not quite enough power except in calm conditions. Try checking the Cat30 owners site for some first hand experience.
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Re: Universal M5411 Engine 11HP

thank you for the reply. I think you are correct. I am very new to sailing and it just sounded like low HP. I will check the Cat for details.
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post #6 of 12 Old 11-10-2013
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Re: Universal M5411 Engine 11HP

I had a Catalina 30. You will be underpowered. I had an M25, and that was the correct size.

You won't be able to make much progress against heavy seas and wind with that engine., and that can be dangerous.

That being said, are there heavy seas and wind where you will be sailing?

David

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"They drove a dump truck full of money up to my house. I'm not made of stone!" -Krusty the Clown
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post #7 of 12 Old 11-11-2013
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Re: Universal M5411 Engine 11HP

While I don't own a CAT, I do own a "beamy" 31' boat that was built in the early 80's. It's "standard" engine was the 5411. The option was the 5424 (which is what mine has). I can't imagine only having 11 hp for a vessel this size. If you love the boat, you'll have to deal with it, maybe up the power during a refit someday.

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post #8 of 12 Old 11-11-2013
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Re: Universal M5411 Engine 11HP

As the others have said, the 5411 that was original to the C30 was under powered except at slack and near-slack tide. While it worked, we did have many moments when we wished we had a more powerful engine. Because of that and other issues we had with the 30 YO engine, we bought a new engine.

Donna


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post #9 of 12 Old 11-11-2013
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Thumbs up Re: Universal M5411 Engine 11HP

Quote:
Originally Posted by rrgl View Post
I am looking to purchase a 1980 30ft Catalina. it has an 11 HP Universal Diesel engine. The question is, do you think that 11HP is sufficient HP to move that boat against a tide or waves? Any guess as to top speed on a flat sea?
Something to keep in mind when you try compare boats and engines is that less than half of the boats out there actually have a Correctly-Pitched prop that will actually put All he available hp to the water.
If this is the older Catalina with the engine under the port settee, it put the shaft near to being parallel to the waterline. That's more efficient than boats with a steeper shaft angle from an engine mounted further aft.

Another thing: the boat you are referencing is near in aux. power to the C-30's with the Yanmar YSM-12. It was also a great engine.

When people talk about having enough power to overcome a chop, OTOH, this is different than powering along in smooth water.
While a smaller engine will drive the boat to 6 kts in smooth water (abso-fricken-lutely), it will always be true that having more hp will be better to maintain speed against a chop. Any engine around 18 to 23 hp will certainly do that.

All engines will have their limits of effectiveness-- that Catalina model has a lot of fullness in the bow sections -- makes it real roomy inside but also is a "squarer" shape to force through a steep chop.

Back to basic speed, IF anyone tells you that their boat will not achieve 6 kts in smooth water, with a clean bottom, they Very Likely have a problem that is NOT related to their engine size.

So do not be afraid of owning an older Catalina with the smaller diesel. Spend your restless nights worrying about spongy decks, blown-out sails, and ancient standing rigging that's 15 years overdue for replacement.

Like all 'net opinions from total strangers, this on is worth about what you are paying, BTW.
Fair Winds,
Loren
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post #10 of 12 Old 11-11-2013
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Re: Universal M5411 Engine 11HP

Quote:
Originally Posted by olson34 View Post
...

So do not be afraid of owning an older Catalina with the smaller diesel. Spend your restless nights worrying about spongy decks, blown-out sails, and ancient standing rigging that's 15 years overdue for replacement.

Like all 'net opinions from total strangers, this on is worth about what you are paying, BTW.
Fair Winds,
Loren
In our case with our 5411, we would have gladly put up with the limited power if we could ensure that when we turned the key it started. There were others issues that a raw water-cooled engine of that age had and we got tired of being nickle and dimed and waiting for parts that were no longer available (even through Kubuta) to be machined.

Donna


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