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fastjeff
#22 Posted : Saturday, August 29, 2009 11:09:43 PM(UTC)
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ANd some photos of the engine room, too--pa-leeze!

No doubt that that boat--propperly propped--will get better gas mileage at cruising speed than with 360s. Muscle boats (go fast boats) get several times better mileage, long as they keep the speeds down.

Jeff
"...reality is not nearly as lovely as the world of Liberal Land. No wonder so many people want to go there." - Tom Sowell
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edst789
#19 Posted : Sunday, August 30, 2009 1:48:39 AM(UTC)
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GB49 wrote:
My 32 can do 70 also but I have to go under the boat and spin the little speed wheel by hand. d'oh!

I think the speed record for a Marinette has been broken by a 1976, 37' sedan. 48mph with twin Crusader 496ci engines. He is docked across from me. Boat sounds awesome and the torque is amazing.
Yes, the steering does gets squirrelly at those speeds since there is virtually no hull in the water.

-Karl



Amazing It was a JOKE ! Anyone who looks at this board knows I just bought a boat and had it transported. I even posted these same pics on here. A couple people got it right away. d'oh!
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edst789
#23 Posted : Sunday, August 30, 2009 3:12:52 AM(UTC)
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Fastjeff wrote:
ANd some photos of the engine room, too--pa-leeze!

No doubt that that boat--propperly propped--will get better gas mileage at cruising speed than with 360s. Muscle boats (go fast boats) get several times better mileage, long as they keep the speeds down.

Jeff


I would also like to see some pics. Up on plane would be nice . I have heard about people repowering with large outboards. Does anyone have any info or pics of that also.
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GB49
#24 Posted : Sunday, August 30, 2009 5:19:25 AM(UTC)
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I'll try to grab some pics. Looks real good with those Crusaders in there!!

-Karl
1986, 32' Sedan, twin 360ci, 275hp Chrysler's w/ K&N flame arrestors
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edst789
#25 Posted : Sunday, August 30, 2009 11:29:32 AM(UTC)
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Karl what's the difference in the engines on a 250hp 360 vs a 275hp 360.
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fastjeff
#27 Posted : Sunday, August 30, 2009 1:08:41 PM(UTC)
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There was a video TV special about a guy who repowered a Marinettewith an outboard. Anyone know where that is?

The 275 hp 360s (and 240 hp 318s) used the center dump exhaust manifolds.

Jeff
"...reality is not nearly as lovely as the world of Liberal Land. No wonder so many people want to go there." - Tom Sowell
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MaxII
#28 Posted : Sunday, August 30, 2009 2:04:10 PM(UTC)
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Jeff, must be another difference, two boats at out marina have 318/240 and neither has the center dumpers. Both are 1987 (manufactured date 8/86). As I understand it, the 240 started in 86, 87 and the center dumpers were used in 88 and after. Often wonder what made the difference in HP .. still don't know.

Max
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Goldpoint
#29 Posted : Sunday, August 30, 2009 9:04:26 PM(UTC)
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Jeff,

Marinette with outboards - the link is: http://backyardboatyard.com/index.htm

John B
1979 28' Sedan Bridge
Single 360
Chattanooga, TN
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fastjeff
#30 Posted : Sunday, August 30, 2009 10:59:46 PM(UTC)
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That's the one.

Thanks, J B.

Jeff
"...reality is not nearly as lovely as the world of Liberal Land. No wonder so many people want to go there." - Tom Sowell
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edst789
#31 Posted : Monday, August 31, 2009 1:16:10 AM(UTC)
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I can see a couple more good points with outboards. You don't have all these thru hull fittings to worry about . You could turn that engine compartment in to a large storage room and you would never have to clear out the floor above the engines again just to check the oil. Now back to reality it's not gonna happen on my boat anytime soon.
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fastjeff
#32 Posted : Monday, August 31, 2009 1:25:24 AM(UTC)
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OB advantages:

1. You can tilt 'em up for low water conditions

2. Propeller thrust angle produces better gas mileage than inboards

3. With twins, better low speed steering on ONE engine

4. Better salt water corrosion resistance. (Seriously.)

5. Cheaper to replace a motor (especially with a Sedan or an Aft Cabin).

6. Safer in the advent of an engine fire.


OB disadvantages:

1. Expensive! (A new Yamaha 350 hp costs $27,000)

2. Poorer low end torque

3. Lower unit it less durable compared to an inboard trans--mine are 24 years old and still going (knock wood!)

4. Massive aft weight (which could upset the boat's balance).


Anyone got a few more?

Jeff
"...reality is not nearly as lovely as the world of Liberal Land. No wonder so many people want to go there." - Tom Sowell
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GB49
#26 Posted : Monday, August 31, 2009 6:00:17 AM(UTC)
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edst789 wrote:
Karl what's the difference in the engines on a 250hp 360 vs a 275hp 360.


I don't know what they did to bump the 318 from 225hp to 240hp.

I know sometime in 1987 (most likely in late 87) they switched over to center dumps. I've seen 1987 Marinettes with center dump and log style manifolds. Supposedly the center dumps allow for slightly more HP but it was never advertised anywhere on the engines or literature.

I think my 1989, 318ci 240HP Chryslers were 5.2 liters.
My 1986, 360ci 275HP Chryslers are 5.9 liters.

Perhaps internal changes were made to tweak the engine and squeeze out more HP?

-Karl
1986, 32' Sedan, twin 360ci, 275hp Chrysler's w/ K&N flame arrestors
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GB49
#33 Posted : Monday, August 31, 2009 6:05:30 AM(UTC)
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Checkout allpar. They compare different type of Chrysler engines.

http://www.allpar.com/mopar/318.html

-Karl
1986, 32' Sedan, twin 360ci, 275hp Chrysler's w/ K&N flame arrestors
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