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Old 3.5 K&B outboard setup help

Old 03-13-2009, 10:13 PM
  #26  
ob nut
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Default RE: Old 3.5 K&B outboard setup help


ORIGINAL: all8up

but since the exhaust is opened up, and the exhaust line to pressure the tank is stock, wouldn't that cause a lack of fuel pressure?
If you read the Cal Mod, there is a 4-40 pressure tap placed on the engine mounting lugs. That supplies the needed fuel pressure.. Just don't use a metal tank as they can't take the "crank" pressure.


ORIGINAL: HOTWATER

Ob nut... you said it...bring back the Gardner xxl exhaust throttles!! ...and Lee Garcia's Mini Marine pipes too!!!
Man, hate to tell ya, but those Garcia Mini Marine pipes sucked If you want to off load it, just PM me!!! Lost count on how many GMM pipes I have..

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Old 03-13-2009, 11:40 PM
  #27  
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Default RE: Old 3.5 K&B outboard setup help

NOT A CHANCE ob nut!!! You are hilarious!! Since you have so many, why don't you just pack some up and send them my way!!!!

What a beautiful OB you have there!!! If some of the members only knew how well the Gardner/ Garcia pipe combo worked....You and I do though...
Old 03-14-2009, 07:25 AM
  #28  
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Default RE: Old 3.5 K&B outboard setup help

"If you read the Cal Mod, there is a 4-40 pressure tap placed on the engine mounting lugs. That supplies the needed fuel pressure.. Just don't use a metal tank as they can't take the "crank" pressure."

thanks for the reply, I read that part, I was just thinking out loud as to why my boat would go out and run about a lap and a half, and die.. I kept thinking it was in the carb adjustment, or the fact that it has been so cold around here..
I am thinking I may be better off to try and restrict the exhaust back like it was originally, since I have a stock carb.. and since the hull really doesn't handle much power anyway..
If I do the 4-40 pressure tap, then I would need more mods to the carb, right?
Old 03-14-2009, 06:46 PM
  #29  
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Default RE: Old 3.5 K&B outboard setup help

The "crank" pressure is normally used on throttle exhaust motors only. Don't think altering this would effect the needed pressure. Other things to consider:

1: Bearings - smooth? top bearing or even the pto's could be leaking.
2: Cracks in the cases?
3: Fuel tank keeping pressure? brass lines ok....
4: Water temp? if cold, remove water pickup.. The lower will act like a heat sink.
5: Check the flex cable / output shaft for any concerns.
6: Is the needle assembly clean?
7: Richen the fuel up. Motors normally don't die when running rich. Open 1/8 to 1/4 turn each time out. Starting point, as already stated early in thread, would be around 4 turns out.

Toss on a 1oz hopper tank. See if the fuel feeding process needs to be relooked at. At times the K&B won't keep running because the fuel is not high enough for the carb to draw on. As you can tell, they are many areas to look at for this condition.

Last year my SS motor would only run 3/4 throttle while it was opened up over 5 1/2 turns. Nothing much I did to it worked.. After sending the motor to Rod G., he found a issue with the crank case. I didn't see a thing. Motor runs great now.
Old 03-14-2009, 07:35 PM
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Default RE: Old 3.5 K&B outboard setup help

ORIGINAL: ob nut

The "crank" pressure is normally used on throttle exhaust motors only. Don't think altering this would effect the needed pressure. Other things to consider:

1: Bearings - smooth? top bearing or even the pto's could be leaking.
2: Cracks in the cases?
3: Fuel tank keeping pressure? brass lines ok....
4: Water temp? if cold, remove water pickup.. The lower will act like a heat sink.
5: Check the flex cable / output shaft for any concerns.
6: Is the needle assembly clean?
7: Richen the fuel up. Motors normally don't die when running rich. Open 1/8 to 1/4 turn each time out. Starting point, as already stated early in thread, would be around 4 turns out.

Toss on a 1oz hopper tank. See if the fuel feeding process needs to be relooked at. At times the K&B won't keep running because the fuel is not high enough for the carb to draw on. As you can tell, they are many areas to look at for this condition.

Last year my SS motor would only run 3/4 throttle while it was opened up over 5 1/2 turns. Nothing much I did to it worked.. After sending the motor to Rod G., he found a issue with the crank case. I didn't see a thing. Motor runs great now.

Yeah...good job ob nut!!!...anyone with a Garcia pipe knows what's goin' on!!!
Old 03-14-2009, 08:05 PM
  #31  
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Default RE: Old 3.5 K&B outboard setup help

last time I tried to run it the conditions were lousy... air temp around 45 and water temp below 40... I think it was just putting the fire out.. even with the water pickup removed.. It gets a lot of air flow across the motor with no cowl in front. so I think it was running colder and colder... but I will have to try again, and now I have a few ideas if it still acts the same..

the way I read the Cal mod, they said after the mod, they had to change the pressure tap, and after the pressure tap, It would run too rich on low end and they had to change the carb.... which I have not done. am I reading this right? thanks, Kerry
Old 03-14-2009, 08:20 PM
  #32  
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Default RE: Old 3.5 K&B outboard setup help


ORIGINAL: HOTWATER

NOT A CHANCE ob nut!!! You are hilarious!! Since you have so many, why don't you just pack some up and send them my way!!!!

What a beautiful OB you have there!!! If some of the members only knew how well the Gardner/ Garcia pipe combo worked....You and I do though...
Not a chance on sending any of my GMM pipes out. One thing about Lee, he never made two pipes the same. Collection stands at five 3.5cc, four 7.5cc, two 11cc, one 13cc (all outboard) and one 7.5 IB pipe..

I talked with Lee after he had an article published back in 91 or 92. Bought all the "right stuff" from him at the time (pipe, XXL and a titanium conrod). Made all the alterations to the ports / case he gave me.. Still have the sheet of instructions in my collections somewhere. After making those changes, it took awhile to find a boat that could handle the power. My Dumas Hot Shot Sprint (wood) was at 6.5lbs and would still blow over. First motor I heard double stage.. Love those pipes!

As for the XXL.. two each for 3.5 and 7.5... Love em' so much, I had someone create a version for my 11cc and 13cc motors.. Have yet to try those out.. Maybe this year.
Old 03-14-2009, 08:44 PM
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Default RE: Old 3.5 K&B outboard setup help

ORIGINAL: all8up
the way I read the Cal mod, they said after the mod, they had to change the pressure tap, and after the pressure tap, It would run too rich on low end and they had to change the carb.... which I have not done. am I reading this right? thanks, Kerry
I had to actually read the article to answer the question. [&:]

The Cal mod is using a throttle exhaust, no carb required. I've never had to use the crank pressure while using a carb. It may help the issue.. Side note: I've never opened up the exhaust like this.. It was either stock or piped. I've heard of 3.5 boats running without pressure, but not many. One I would trust his comment to be 100% true.

Thinking about this again.. Just how does the motor run? When you fire up the motor, how does it act.. Will the motor rev right up when the throttle is applied. (lean) Does it gurgle, then clean out and rev up. (just right).. It is possible that since the air and water temp are cold, finding the right spot will be more difficult.
Old 03-15-2009, 12:07 AM
  #34  
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Default RE: Old 3.5 K&B outboard setup help


ORIGINAL: ob nut


ORIGINAL: HOTWATER

NOT A CHANCE ob nut!!! You are hilarious!! Since you have so many, why don't you just pack some up and send them my way!!!!

What a beautiful OB you have there!!! If some of the members only knew how well the Gardner/ Garcia pipe combo worked....You and I do though...
Not a chance on sending any of my GMM pipes out. One thing about Lee, he never made two pipes the same. Collection stands at five 3.5cc, four 7.5cc, two 11cc, one 13cc (all outboard) and one 7.5 IB pipe..

I talked with Lee after he had an article published back in 91 or 92. Bought all the "right stuff" from him at the time (pipe, XXL and a titanium conrod). Made all the alterations to the ports / case he gave me.. Still have the sheet of instructions in my collections somewhere. After making those changes, it took awhile to find a boat that could handle the power. My Dumas Hot Shot Sprint (wood) was at 6.5lbs and would still blow over. First motor I heard double stage.. Love those pipes!

As for the XXL.. two each for 3.5 and 7.5... Love em' so much, I had someone create a version for my 11cc and 13cc motors.. Have yet to try those out.. Maybe this year.
Hey ob nut!

I actually bought the Gardner XXL and the Garcia pipe together from Lee when a bunch of us went to NAMBA nats in Bristol, PA in 1993...so the dates you gave are right about on. He was a great guy to talk to and even gave me a few parts out of his stash! His daughter was racing that weekend too and she was his pit girl. They had a bunch of boats that they brought with them from California, all outboards (mostly riggers) and a few outboard CalCraft monos that his dauter liked to race. One of his very fast outriggers stalled during a race and was literally cut in half (yes the cables too!) and...you guessed it...his highly modified OB went to the bottom of the lake!!! He was just sick about that! He said that the guy that hit him apologized about it, but I knew he was upset about it none the less. Also, that was the same weekend I met Remy from Aeromarine Laminates. We saw the Aeromarine banner hanging from their table, so we went up, started talking and found out that the warehouse that they were in (in N.Y.) had caught on fire earlier that year destroying most of the boat moulds and that they had just moved to Seaford, Delaware! I told them that I live in Delaware and would be thrilled to visit the new shop. I now have a few Aeromarine boats which I love (great gel coat finishes!).

Sorry that this is off topic...just wanted to blab a little to someone who appreciates the somewhat earlier outboard days...

-Kent
Old 03-15-2009, 12:33 AM
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Default RE: Old 3.5 K&B outboard setup help

wrong post [:@]

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