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stc315

  • Karma: +3/-0
engine offset
« on: January 19, 2010, 12:52:41 PM »
How much offset should the engine have from the pump to give the driveline the slight angle it needs? 1/2", 1"???
  • Boat #1: 1987 Baker Tunnel Jet
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Ralph Brunt

  • Karma: +51/-0
Re: engine offset
« Reply #1 on: January 19, 2010, 03:55:13 PM »
4*intake set engine at 3 or 5*
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Luckie Stiff

  • Karma: +29/-0
Re: engine offset
« Reply #2 on: January 19, 2010, 04:53:35 PM »
4*intake set engine at 3 or 5*

Ralph is right. My boat is setup like this:

Crank centerline and pump shaft centerline are even as far as elevation and left to right, BUT my motor is set at 5* this give the u-joint all the deflection they need.
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stc315

  • Karma: +3/-0
Re: engine offset
« Reply #3 on: February 10, 2010, 07:39:34 PM »
Don't have an angle finder, what does that translate into inchs?
  • Boat #1: 1987 Baker Tunnel Jet
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Luckie Stiff

  • Karma: +29/-0
Re: engine offset
« Reply #4 on: February 10, 2010, 08:33:20 PM »
Don't have an angle finder, what does that translate into inchs?

Sam, you really need an angle finder for this, Harbor Freight has them for like 6 bucks.
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stc315

  • Karma: +3/-0
Re: engine offset
« Reply #5 on: February 10, 2010, 08:48:31 PM »
Its a damn mile to Harbor Freight!!! I know.... cheap, lazy bastard. Get of my azz and go lol.

Thanks Skip, I'm slowly but surely moving along. Found a diverter tonite!!!  ;D and my neighbor has a cherry picker he's gonna let me borrow. Just waiting on two mount feet that Boost is sending and I'll be ready to drop the motor in!!!  O0
  • Boat #1: 1987 Baker Tunnel Jet
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GT Jets

  • Karma: +192/-0
Re: engine offset
« Reply #6 on: February 10, 2010, 08:52:20 PM »
Sam, you really need an angle finder for this, Harbor Freight has them for like 6 bucks.

Skip, you know better than that.....

If you can get the known height at the front of the engine at 0*, then on a 24" engine (BBC) you would add 1/2", this equals 1* of deflection which will be plenty because you wont get it that close IMHO.....Sheez. :sly:

I think a Ford 429/460 is about 24" long also. :-\  Don't do many Fords. ;)

Didn't you take Geometry in High School?   ;D

A small block would be just under 1/2", it works out to about 7/16"  :thumbup:

GT
  • Boat #1: 1992 Carrera 20.5 Elite (I/O bitches)
  • Boat #2: 19' Bubble deck Jet BBC Berkeley
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If i get some free time tonight at work, ill play with it and post it for everyone to see.

Time to man up and yank it John!  :banghead:
Ray

Luckie Stiff

  • Karma: +29/-0
Re: engine offset
« Reply #7 on: February 10, 2010, 08:59:49 PM »
For $6 I can avoid all that damn math!
 :screwy:
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stc315

  • Karma: +3/-0
Re: engine offset
« Reply #8 on: February 10, 2010, 09:03:15 PM »
I will probably go get the dang angle finder to double check. I'm going to try the existing stringer holes and see where that puts me and go from there.
  • Boat #1: 1987 Baker Tunnel Jet
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GT Jets

  • Karma: +192/-0
Re: engine offset
« Reply #9 on: February 10, 2010, 09:05:28 PM »
For $6 I can avoid all that damn math!
 :screwy:

LOL, doing the math I can avoid diggen through the toolbox.... :thumbup:

I have done so many of these I have a steel post I made that fits over the splined input shaft of the Berkeley's and is the same length as a driveline and a BBC crank, I make a cardboard front template that tells me where the crank snout should end up......I am the laziest when it comes to that stuff... :screwy:

It works out to .489" BTW... :thumbup:

GT
  • Boat #1: 1992 Carrera 20.5 Elite (I/O bitches)
  • Boat #2: 19' Bubble deck Jet BBC Berkeley
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If i get some free time tonight at work, ill play with it and post it for everyone to see.

Time to man up and yank it John!  :banghead:
Ray

GT Jets

  • Karma: +192/-0
Re: engine offset
« Reply #10 on: February 10, 2010, 09:08:36 PM »
I will probably go get the dang angle finder to double check. I'm going to try the existing stringer holes and see where that puts me and go from there.

Do yourself a solid, if the holes don't line up perfectly, go get a Forstner drill bit and punch the holes and epoxy up some hardwood doweling and plug them and re drill new holes, it makes it mo betta. :thumbup: This shouldn't take more than a couple hours..

Git Er Done!!! :thumbup:
  • Boat #1: 1992 Carrera 20.5 Elite (I/O bitches)
  • Boat #2: 19' Bubble deck Jet BBC Berkeley
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If i get some free time tonight at work, ill play with it and post it for everyone to see.

Time to man up and yank it John!  :banghead:
Ray

Luckie Stiff

  • Karma: +29/-0
Re: engine offset
« Reply #11 on: February 10, 2010, 09:11:27 PM »
Good answer, freakin' GT with his math, WTF is he thinkin'?
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Marcsrollin

  • Karma: +33/-0
Re: engine offset
« Reply #12 on: February 10, 2010, 10:55:50 PM »
The holes in the stringers are the factory holes from eliminator and the boat orginally came with a ford , so the holes should be close enough for you state workers! ;D
  • Boat #1: 1978 TX-19 Youngblood
  • Boat #2: 1994 24 foot Sundancer Pontoon
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Taco'd "a person or people that show up with one lake lice and a family of 50 and cram 3 people at a time on it with no disregard to boating rules or ethics. Usualy crap in toilets and throw shit paper in trash cans. Hang out at the boat ramp like its a swimming hole. Have zero insurance on anything they own and dont give two shits less about your property."

 


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