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ChocLabWhaler posted 06-22-2002 05:48 PM ET (US)   Profile for ChocLabWhaler   Send Email to ChocLabWhaler  
I finally join your ranks! I bought an "old blue" - the one listed in Markeplace. Wife seems excited to accessorize it!?! UhOh!
1st question, of many, - Do I keep the engine up or down on the trailer in the yard? What's best for the PT&T pistons?
2nd, Replace and test the Depth/fish finder in the yard or the water?
3rd, Are trailering and storages covers different? Seems like everyone recommends Bass Pro or West Marine.
I'm glad to be here.....
B Bear posted 06-22-2002 07:42 PM ET (US)     Profile for B Bear  Send Email to B Bear     
Great for you!
answer one: if you can keep the engine down, this is less stress to the transom and will allow the water to drain out.

answer two: repalace the depth/fish finder in the yard and test out in the water.

answer three: check the past threads on covers, there are Mills, Overtons and others that provide covers made just for your blue. These threads will give you a better base perspecive to make a descision from.

Welcome to the good world of whaling.

jimh posted 06-22-2002 07:59 PM ET (US)     Profile for jimh  Send Email to jimh     
Fishfinders are a bargain. You can get a nice new one for about $120, like a LOWRANCE X-51.

I'd see if the old one works or not. If not, it's a simple install on a new one, but you have to have the boat out of the water to mount the transducer.

Jay A posted 06-23-2002 12:23 AM ET (US)     Profile for Jay A    
I have to disagree with B Bear with the engine down . 2/3's of the weight of the engine is in the powerhead,lifting it will allow the weight to concentrate staight down on and foward of the transom instead of 90% of the weight hanging off the stern and being "pulled" away from the transom. As far as the fishfinder is concerned, if you are talking about the transducer,then yes, replace in the yard. If it's the fishfinder itself,it doesn't matter. I'm not sure of storage covers.
B Bear posted 06-23-2002 09:59 AM ET (US)     Profile for B Bear  Send Email to B Bear     
Jay A,
That is an interesting perspective. The engine is still transfering it's weight load to the pivot points on the engine mount. with the engine up the PT&T rams would be fully extended keeeping them exposed to the elements. Also countering the power head is the lower unit which the is extented out and away from the pivit point increasing the its weight effect in off balancing the engine weight on the transom. The engine mount is made to hold the engine in a down position and the closer to mount the less stress there will be.

Many people trailer with the engine down for this reason. Another factor in storing the engine down is when fall comes there is no possibility of having water reained in the engine cooing system preventing an chance of the water frezzing and damaging the engine. Granted this depends on the region you live in. Those with four stroke engines also benefit by keeping their engine fluids in their sumps.

I hope some other members might chime in about this, I am not saying I am totally correct, but I have heard this many times before.


Jay A posted 06-23-2002 11:05 AM ET (US)     Profile for Jay A    
B Bear, I really don't think there is much a difference but around 7 or 8 years ago I was working in a lab that conducts environment stress sceening tests when several technicians had the same question. One of them brought in their boat,an 18' bowrider with a 85hp Evinrude. They found that with the engine in the up position,which spread the weight more evenly,it reduced load pressure on the transom by around 45 %.
ShrimpBurrito posted 06-23-2002 12:48 PM ET (US)     Profile for ShrimpBurrito  Send Email to ShrimpBurrito     
You may indeed reduce the stress on the transom with the motor up, but is that really necessary? The engine propels in the down position, and while underway, exerts lots of pressure on the transom. Imagine how much force is exerted on the transom when that 2000 lb boat is going 45 MPH with an additional 500-1000 lbs of people, fuel, and gear. Then compare that to the pressure of the 250-300 lb engine resting on the transom.

My motor is always in the down position, even while trailering. The boat rides high on the trailer, and the lower unit rides higher than the axle.

Jay A posted 06-23-2002 08:11 PM ET (US)     Profile for Jay A    
ShrimpBurrito,You are correct,the engine down propels the boat and it's disigned that way. However when it's pushing the boat the stress is partially transfered to the sides of the hull,pushing thru towards the bow.But when trailering in the down position,there is no foward pressure only downward pressure amplified when you hit a bump.Most transoms can accomodate this. A buddy of mine trailered his boat this way all over New England and his prop picked up pepples to the point that it looked sandblasted,he had to replace it after only two seasons.After 5 or 6 seasons with the motor up,he still has the same prop with no road damage!And B Bear: For years I would remove my 40hp Merc from my 13' Whaler and store it in my basement for the winter,now I have a 200hp Suzuki on a Seapro and flush & drain the engine,replace the lower gear fluids and shrinkwrap the entire boat and motor for the winter.
B Bear posted 06-23-2002 09:40 PM ET (US)     Profile for B Bear  Send Email to B Bear     
Well,I learn something new everyday, thanks Jay.

Just one more question - considering the quaility of engineering and materials used in the transom and that it has been designed to carry a static load of an engine, does it really matter if the engine is down considering the side benefits of storing the uint that way.

By the way, I trailer with the engine up using the stops equipped on the engine itself.


Jay A posted 06-24-2002 05:15 PM ET (US)     Profile for Jay A    
B Bear: Probably not! But I've seen some engines mounted with lag bolts just holding on to the "meat" of the transom! And over time the glass around the bolts will begin to fail with access vibration and weight. As for trailering...always up. I've seen some nasty things over the years to lower units and props from trailering in the down position. And I'm sure you know how expensive they are!
ShrimpBurrito posted 06-24-2002 06:31 PM ET (US)     Profile for ShrimpBurrito  Send Email to ShrimpBurrito     
Hmmm....maybe I'm just lucky, but I've towed my 1987 15' SS over 20,000 miles in the past few years alone with the motor down, and there are no stress cracks anywhere on the transom. (The prop is also fine, but that doesn't have anything to do with the transom saver.) Again, the lower unit and prop are higher than the axle, so clearance is not an issue.

As far as the pressure that's exerted on the transom while underway, I would argue that jumping a wave or a decent sized swell puts at least as much pressure on the transom in a jarring motion as hitting a pothole while on the trailer, AND, that pressure is exerted in the same direction. I would also argue that the amount of engine thrust at any given speed would be directly comparable to weight of the engine bouncing while on the trailer. I don't know exactly how much thrust a typical outboard delivers, but to give you an idea, a typical electric trolling motor delivers ~50 lbs. The motor acts as a simple lever against the transom. For every lb of thrust that is delivered at the prop, a lb of force is exerted whereever it's mounted.

whalernut posted 06-30-2002 09:42 PM ET (US)     Profile for whalernut  Send Email to whalernut     
Congratulations on your "Old Blue"!! Great boat and a true "Classic"!! Jack.
Bigshot posted 07-01-2002 09:40 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
If I owned a carolina skiff......get a transom saver. If you own a non PTnT engine, maybe a good idea to keep it from bouncing.

To give you an idea of how much stress an engine under power puts on a hull, try tilting a kicker when it is anything above idle in gear......ha!

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