3 cylinder carbs

[hydroman6]

Looking thru the APBA rulebook, and I need to ask a question of the "master" engine builders and the MOD Inspectors.

MODIFICATION OF MOTORS:
2. ........ The block you use determines which make and model motor specifications apply to your engine.

5. ........ Only the same manufacturers service carburetors for that motor and model may be used on your FE motor.......

This means to me, that during an tech inspection, the serial number of my block is cross referenced to a list of acceptable carbs for me to run (casting numbers perhaps?).

If a guy has a 65 HP block, he CANNOT run 70 HP carbs unless they were available that way from the factory.....Right.

In another thread, Modifiedoutboard made a comment about Mod 50 intakes being in the junkyard "right next to the large piles of 75 Stinger carbs". SURLEY these are not being run on 65 and 70 HP triples are they ?

Would sure like to get my hands on a copy of the block/carb cross reference list.

[sasbenson]

Originally posted by hydroman6
Looking thru the APBA rulebook, and I need to ask a question of the "master" engine builders and the MOD Inspectors.

MODIFICATION OF MOTORS:
2. ........ The block you use determines which make and model motor specifications apply to your engine.

5. ........ Only the same manufacturers service carburetors for that motor and model may be used on your FE motor.......

This means to me, that during an tech inspection, the serial number of my block is cross referenced to a list of acceptable carbs for me to run (casting numbers perhaps?).

If a guy has a 65 HP block, he CANNOT run 70 HP carbs unless they were available that way from the factory.....Right.

In another thread, Modifiedoutboard made a comment about Mod 50 intakes being in the junkyard "right next to the large piles of 75 Stinger carbs". SURLEY these are not being run on 65 and 70 HP triples are they ?

Would sure like to get my hands on a copy of the block/carb cross reference list.

A little vague and confusing for sure! and I would agree the MORC should tidy that one up a little. BUT, if you look a the inspectors manual and instructions for inspecting the engine there is no spec for any "service" carb. The reality is, that any carb used by the approved 55,65,70,75 49inch service motor is OK and If Bob Goller were to look at your nationals winning FE, He simply looks to see if you have a "service" carb (as in no Mikunis, holly four barrels ect) opens the butterfly(which better be able to shut off the air when closed) looks down in there to make sure you got 6 reeds in an UNMODIFIED (as in made bigger to accommodate more reeds) area, checks the bore and stroke, smiles politely and says, "looks good to me" How to do we know this to be true you ask?


Benson

[form-e one]

haaa steve cheyney here,,,on the v-rude as i call it you can use an omcmanufactured single barrel carb used for /on that engine there is ni cross reference to go by...as you know i use a older carb on mine as john and howard found out it works better ,,if ya want give me a shout and ille tell ya the poop on it ...cheyney,,,,chaneco1@yahoo

[hydroman6]

Steve (Benson)

I do agree that the MORC should clean this one up, however, I have a hard time seeing this as vague and confusing. When the book says "....only carburetors for that displacement motor and model (read 55, 65 70 and 75 hp) may be used....." , that says to me that carbs from a 75 hp model cannot be used on a 65 hp block.

Understand that "everyones doing it", but there are many inspectors, and with my luck, guess which one I'm going to get. Perhaps the rule should specify "any single barrel OMC carb". Simple, sweet, and no confusion.

Lots or readers out there, any other opinions? or is it just that I'm a little too anal. It's teh job's fault, I promise.

PS, I knew there was no list before I started this thread

[David_L6]

Originally posted by hydroman6
Steve (Benson)

I do agree that the MORC should clean this one up, however, I have a hard time seeing this as vague and confusing. When the book says "....only carburetors for that displacement motor and model (read 55, 65 70 and 75 hp) may be used....." , that says to me that carbs from a 75 hp model cannot be used on a 65 hp block.

Understand that "everyones doing it", but there are many inspectors, and with my luck, guess which one I'm going to get. Perhaps the rule should specify "any single barrel OMC carb". Simple, sweet, and no confusion.

Lots or readers out there, any other opinions? or is it just that I'm a little too anal. It's teh job's fault, I promise.

PS, I knew there was no list before I started this thread


That wording may be OK if there isn't a single barrel OMC carb that's a lot larger. (I don't know if there is or not...) How big are the carbs that came on the 56 inch 3 holers? How about wording the rules like this: "....only carburetors for that displacement motor may be used....." ?

[MN1]

I've heard that the newer model carbs on the 3 cyl. OMC had the fuel enrichment solinoids for choke instead of the choke plate in the carb.
Is this true??
Mark N

[sasbenson]

Originally posted by hydroman6
Steve (Benson)

I do agree that the MORC should clean this one up, however, I have a hard time seeing this as vague and confusing. When the book says "....only carburetors for that displacement motor and model (read 55, 65 70 and 75 hp) may be used....." , that says to me that carbs from a 75 hp model cannot be used on a 65 hp block.

Understand that "everyones doing it", but there are many inspectors, and with my luck, guess which one I'm going to get. Perhaps the rule should specify "any single barrel OMC carb". Simple, sweet, and no confusion.

Lots or readers out there, any other opinions? or is it just that I'm a little too anal. It's teh job's fault, I promise.

PS, I knew there was no list before I started this thread

I suppose you could write to and ask for a writen statement regarding this issue to the mod national chairman and tape it to the inside of your toolbox just to be sure . But I personally am comfortable going on the premise that ANY single throat carb used on any 49inch 3cyl will get thru inspection. If you think the rule should be made clearer then by all means make your case with MORC.and get it fixed. up till now there didn't seem to be a problem.

regards,

Benson

[David_L6]

Originally posted by sasbenson
If Bob Goller were to look at your nationals winning FE, He simply looks to see if you have a "service" carb (as in no holly four barrels ) Benson

Uh oh... I wonder if Pep-Boys will take back them 3 double pumpers?

:D :D :D :D :D :D

[modifiedoutboard]

They can be bored as long as do not add material
Other things can be done to improve air flow in.

[sasbenson]

Well Heck, being the fiesty old Irishman that I am, I just couldn't resist!! Here one that doesn't look like it was whittled out with a pocket Knife.
Benson

[mercguy]

you know pictures don't tell us anything........results do!!!:D

[hydroman6]

Steve-

Good enough for me! You the man, as my kid (6'4, 250) says. He's also my non-electric starter. Everyone else seems comfortable with your interpretation (sp), and that's good enough for me.

Found a guy on a business trip that has carbs. If he has 1, he has 100. Just wanted to get a warm fuzzy before I sorted thru the pile. Mabe this is the junk yard someone was talking about in another thread...the one w/ the Mod 50 parts?

Been doin the diet thing. mabe it won't matter what kind of carbs I run. Anyone got lead?

[pro350hydro]

Originally posted by sasbenson
Well Heck, being the fiesty old Irishman that I am, I just couldn't resist!! Here one that doesn't look like it was whittled out with a pocket Knife.
Benson

Steve Benson

Nice looking machine work. I have seen those on your other "record setting" motors.

Mike

[pro350hydro]

Originally posted by hydroman6
Steve-

Good enough for me! You the man, as my kid (6'4, 250) says. He's also my non-electric starter. Everyone else seems comfortable with your interpretation (sp), and that's good enough for me.

Found a guy on a business trip that has carbs. If he has 1, he has 100. Just wanted to get a warm fuzzy before I sorted thru the pile. Mabe this is the junk yard someone was talking about in another thread...the one w/ the Mod 50 parts?

Been doin the diet thing. mabe it won't matter what kind of carbs I run. Anyone got lead?

Steve P.

As fast as that TRIPLE was running last year, you competitors might to try and sneak some lead in that boat anyway. even if you do the diet thing. You have never had a problem holding your own, even against the younger generation. No pun intended.

Mike

[pro350hydro]

Originally posted by hydroman6
Steve-

Good enough for me! You the man, as my kid (6'4, 250) says. He's also my non-electric starter. Everyone else seems comfortable with your interpretation (sp), and that's good enough for me.

Found a guy on a business trip that has carbs. If he has 1, he has 100. Just wanted to get a warm fuzzy before I sorted thru the pile. Mabe this is the junk yard someone was talking about in another thread...the one w/ the Mod 50 parts?

Been doin the diet thing. mabe it won't matter what kind of carbs I run. Anyone got lead?

p.s. Looks like the driver in training is liking the new ride.

[mercguy]

ah, a laydown converted to temporary "sit down" use............how's he supposed to pull the pipes?????:D

[pro350hydro]

Originally posted by mercguy
ah, a laydown converted to temporary "sit down" use............how's he supposed to pull the pipes?????:D

pipes don't slide Daren, have another beer:D

[mercguy]

Originally posted by pro350hydro
pipes don't slide Daren, have another beer:D

must be this Coor's Light I have here..............or maybe because I forgot to buy more popcorn today????????

[pro350hydro]

Originally posted by mercguy
must be this Coor's Light I have here..............or maybe because I forgot to buy more popcorn today????????

Daren,

I told you, popcorn just ruins a good buzz......

Grab another cold one, you'll be fine

[hydroman6]

MERCGUY,

It's a laydown FE, but for him, I could add pipes and slide the floor board on thompson rails. that way, he can keep both hands on the wheel. Foot throttle of course. Think anyone would notice he's only 4?

[pro350hydro]

Originally posted by hydroman6
MERCGUY,

It's a laydown FE, but for him, I could add pipes and slide the floor board on thompson rails. that way, he can keep both hands on the wheel. Foot throttle of course. Think anyone would notice he's only 4?

Interesting, we could start a new class......

p.s. think his leg/foot is strong enough?

[sasbenson]

Originally posted by MN1
I've heard that the newer model carbs on the 3 cyl. OMC had the fuel enrichment solinoids for choke instead of the choke plate in the carb.
Is this true??
Mark N

Yep, true story,.... OMC, and Mercury stopped using choke plates about 25years ago. where you been boy?? Ever try to start an inline six merc 1500 on a 20degree morning that had the old plastic two butterfly choke deal? take lots of batteries and spare starters with you!!

Benson