outboard mailbox blower?

[eborac]

I'm always astounded how you guys can use mail boxes over there. You must have some pretty relaxed regulations re interfering with the environment.
I was told I'd need a permit for putting a professional looking tripod on the beach because "it disturbs the sand". In Australia the sand will remain undisturbed if you pay but disturbed if you don't pay. Very interesting phenomenon, almost warrants a study.

 

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[rgecy]

18" diameter mailbox on a Yamaha 225 Outboard and in 15' of water, we were able to blow a hole 3-4' deep and 15' in diameter. I would definitely say it would be better with a shallower angle and in shallower water. Maybe 10' or less would be better.

By the way, its For Sale if anyone is interested! $1200 or best offer!

 

[MATAKI2000]

Here is one I made for my Yahmaha 225. Its 18" diameter and has a 2' longer down tube to help blow in deeper water. I also have a picture of another smaller one on a 25 horse outboard that I will post later.

This pict is before we put the mounting brackets on. Will try to post those later as well. I think there are some picts in another topic if you do search.

http://forum.treasurenet.com/index.php/topic,48219.0.html

Robert

RGecy
May you post the picture of the 25 HP outboard mailbox ?
Thanks !

 

[rgecy]

I am not sure where that image is anymore. It was from a news article clipping talking about treasure hunting and was actually posted originally by someone else back around 2004. The blower was attached to the motor by a pivoting frame attached near the cowling.

The one on the 25hp was probably 14-16" in diameter.

I am actually considering modifying the 18" blower above and removing the 2' extension. This will make the blower blow a little more out than straight down and maybe help clear the hole a little better. This would also help keep the sand and shells from coming back in to the water pump.

Robert

 

[birdman]

Awesome ! My boat has two 18 HP johnsons on them an I am not sure they would not stay running long enough to find anything. The motors are both 64 models and I can keep em going but they nickle and dime me. Yea..I need to upgrade. I would love to see how this set up works in the shallows.

 

[Darshevo]

Not being involved in dive oriented treasure hunting I am curious about the blower set ups. The usage makes perfect sense, and in the case of these outboard driven models I see how they would be really quite useful in shallower waters. I have seen in passing pictures of much larger boats that have 2 blowers on them that at least by scale in the picture look to be 24" or better across. Are these still useful only in shallow waters (say up to 10-15 feet) or does the much larger size give them a substantial depth increase?

-Lance

 

[rgecy]

Our former boat the Conquistador has dual 24" blowers and can blow in 30' of water no problem. Some of the larger vessels with 48-54" blowers can blow in 50'+ of water. Engine and prop size are certainly important. Some vessels have added longer down tubes to help when blowing in deeper water.

 

[Darshevo]

I am sure you hear this all the time, but if I am ever in that neck of the woods I would work for free (right down to barnacle duty) just to be part of the adventure

Thanks for the info - hopefully someday I can make my way to the coast and become involved

-Lance

 

[MATAKI2000]

RGecy
Thanks a lot ! for all the valuable info you post here.