Search found 14 matches

by joshua357
Sat Apr 22, 2017 5:43 pm
Forum: Automotive Power Only
Topic: 4.3 DD Prop
Replies: 34
Views: 1161

Re: 4.3 DD Prop

Good to know. My engine came out of an older ski boat. Wanting to do the build on the cheap. My brother got me hooked on blow boats and once you have the itch, well you know. Were in central Florida. Maybe one day we will bump into each other. Sent from my iPhone using Southern Airboat mobile app p...
by joshua357
Sat Apr 22, 2017 3:11 pm
Forum: Automotive Power Only
Topic: 4.3 DD Prop
Replies: 34
Views: 1161

Re: 4.3 DD Prop

No its stock. It's a non vortec. I'm going to replace the carb on it to a better one. But I'm enjoying getting out meeting new people and getting some stick time. Sent from my iPhone using Southern Airboat Good to know. My engine came out of an older ski boat. Wanting to do the build on the cheap. ...
by joshua357
Sat Apr 22, 2017 3:08 pm
Forum: Automotive Power Only
Topic: 4.3 DD Prop
Replies: 34
Views: 1161

Re: 4.3 DD Prop

No its stock. It's a non vortec. I'm going to replace the carb on it to a better one. But I'm enjoying getting out meeting new people and getting some stick time. Sent from my iPhone using Southern Airboat Good to know. My engine came out of an older ski boat. Wanting to do the build on the cheap. ...
by joshua357
Sat Apr 22, 2017 2:59 pm
Forum: Automotive Power Only
Topic: Are there any pics of 4.3 direct drive set ups out there
Replies: 6
Views: 582

Re: Are there any pics of 4.3 direct drive set ups out there

southern safaris wrote:Another try

Just getting started on my build. Have a 4.3 as well. Is your engine stock or did you modify it any? If so what mods? You have a nice looking set up and it sounds like it performs well.


Sent from my iPhone using Southern Airboat mobile app powered by Tapatalk
by joshua357
Sat Apr 22, 2017 2:38 pm
Forum: Automotive Power Only
Topic: 4.3 DD Prop
Replies: 34
Views: 1161

Re: 4.3 DD Prop

Here is my 12' Taylor hull with a dd 4.3. Does pretty good. Will run some dry. It's my first boat so I'm learning. Sent from my iPhone using Southern Airboat mobile app powered by Tapatalk https://uploads.tapatalk-cdn.com/20170422/fcb333ade615816ae193491b2630468b.jpg Any mods to the engine? Sent fr...
by joshua357
Fri Apr 21, 2017 9:32 pm
Forum: Automotive Power Only
Topic: 4.3 DD Prop
Replies: 34
Views: 1161

Re: 4.3 DD Prop

There you go! You got a starting point Good luck with it and make sure that what ever you do with the build that it is safe, that's what matters most. Will do. Slow and steady. I'll be leaning on y'all for advice along the way. Sent from my iPhone using Southern Airboat mobile app powered by Tapata...
by joshua357
Fri Apr 21, 2017 9:17 pm
Forum: Automotive Power Only
Topic: 4.3 DD Prop
Replies: 34
Views: 1161

Re: 4.3 DD Prop

It will not be an issue if you are going to do a quality rebuild. When the block and heads go to the machine shop and they hot tank it that scale and corrosion should dissolve away. If I understand the Mercruiser 4.3 platform it is essentially a SBC with 2 cylinders removed. As such my best direct ...
by joshua357
Fri Apr 21, 2017 7:39 pm
Forum: Automotive Power Only
Topic: 4.3 DD Prop
Replies: 34
Views: 1161

Re: 4.3 DD Prop

It will not be an issue if you are going to do a quality rebuild. When the block and heads go to the machine shop and they hot tank it that scale and corrosion should dissolve away. If I understand the Mercruiser 4.3 platform it is essentially a SBC with 2 cylinders removed. As such my best direct ...
by joshua357
Fri Apr 21, 2017 4:58 pm
Forum: Automotive Power Only
Topic: 4.3 DD Prop
Replies: 34
Views: 1161

Re: 4.3 DD Prop

Was it a raw water cooled engine or did it have a sealed cooling system? I ask because if it was a raw water cooled engine used in salt or brackish water the chance of rust and scale would be very concerning. An airboat uses a sealed system configuration where corrosion and scale will restrict the ...
by joshua357
Fri Apr 21, 2017 4:56 pm
Forum: Automotive Power Only
Topic: 4.3 DD Prop
Replies: 34
Views: 1161

Re: 4.3 DD Prop

Excellent point, the boat it came out of was single engine. Spent my younger years skiing behind it. I will check it out to be safe. Would not look real cool going backwards.


Sent from my iPhone using Southern Airboat
by joshua357
Fri Apr 21, 2017 4:54 pm
Forum: Automotive Power Only
Topic: 4.3 DD Prop
Replies: 34
Views: 1161

Re: 4.3 DD Prop

Also, you may want to check and make sure that the engine is not a counter rotation setup. I've heard that it is sometimes found to be the case at least in dual engine boats where one engine spins clockwise and the other goes counterclockwise (not familiar with the particular one that was mentioned...
by joshua357
Fri Apr 21, 2017 11:08 am
Forum: Automotive Power Only
Topic: 4.3 DD Prop
Replies: 34
Views: 1161

Re: 4.3 DD Prop

So, is that to imply that it was formerly mated to a Mercruiser stern drive? If so, it would behoove you to at least swap the cam for something more productive at lower rpms. Swamphunter's question is beyond passively relevant because you will need everything you can get out of it without leaving a...
by joshua357
Fri Apr 21, 2017 8:02 am
Forum: Automotive Power Only
Topic: 4.3 DD Prop
Replies: 34
Views: 1161

Re: 4.3 DD Prop

The motor is from an older Maxim that had to be put out to pasture due to hull issues.
by joshua357
Thu Apr 20, 2017 11:28 am
Forum: Automotive Power Only
Topic: 4.3 DD Prop
Replies: 34
Views: 1161

Re: 4.3 DD Prop

I am building my first airboat on a 12" glass hull and plan on using the same engine. Ill be interested in what the community has to offer for advice on this particular setup.

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