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Old 01-19-2015, 09:08 PM   #1
Awesomesilverado
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Default 88 marathon carburetor question

If I am going to premix my fuel on my 88 marathon is there any reason I cannot use lets say a carb off a 87 or 89, what makes the 88 carb specific to the 88 only, any one know?
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Old 01-19-2015, 09:10 PM   #2
1989Marathon
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Default Re: 88 marathon carburetor question

88 has a larger venturi
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Old 01-19-2015, 09:10 PM   #3
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Default Re: 88 marathon carburetor question

It's bigger, better performance. It will run with others, but I would stick with the stocker. That and the exhaust is what gives the 88, more "juice" than the other 2 strokes.
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Old 01-19-2015, 09:16 PM   #4
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Default Re: 88 marathon carburetor question

Don and Morgan are right.

The pre-88 Marathons used a Mikuni BV18 carburetor, while the 1988 model used a BV24. That's 18mm vs. 24mm, or a 33% LARGER venturi on the 88. That, paired with the 1988 only exhaust which is MUCH better, gets you some very noticeable power gains on an 88 over the older models. One post I read stated the early models were rated at 9hp, while the 88 was rated at 11hp.

Last edited by 93yellowclubcar; 01-19-2015 at 09:17 PM.. Reason: Called 89 the wrong name!!!
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Old 01-19-2015, 09:17 PM   #5
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Default Re: 88 marathon carburetor question

Quote:
Originally Posted by 93yellowclubcar View Post
Don and Morgan are right.

The pre-88 Marathons used a Mikuni BV18 carburetor, while the 1988 model used a BV24. That's 18mm vs. 24mm, or a 33% LARGER venturi on the 88. That, paired with the 1988 only exhaust which is MUCH better, gets you some very noticeable power gains on an 88 over the older models. One post I read stated the early models were rated at 9hp, while the 88 was rated at 11hp.
Dave's not here...
Dang, beat me to it!
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Old 01-19-2015, 09:21 PM   #6
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Default Re: 88 marathon carburetor question

Quote:
Originally Posted by 1989Marathon View Post
Dave's not here...
Dang, beat me to it!
Realized what I'd done as soon as I hit "submit reply"

I've been digging through old posts for the last little while, lots of good stuff from Dave there had his name fresh in my head.
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Old 01-19-2015, 09:25 PM   #7
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Default Re: 88 marathon carburetor question

That answers my question and I am sure it will help others who may have wondered, Thanks fellers!!!!
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Old 01-19-2015, 09:27 PM   #8
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Default Re: 88 marathon carburetor question

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Originally Posted by 93yellowclubcar View Post
Realized what I'd done as soon as I hit "submit reply"

I've been digging through old posts for the last little while, lots of good stuff from Dave there had his name fresh in my head.
I'm just messin with you.
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Old 01-19-2015, 09:31 PM   #9
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Default Re: 88 marathon carburetor question

what about the rev limiter or governor on these engines, someone has taken mine off and done away with it any suggestions?
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Old 01-19-2015, 09:31 PM   #10
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Default Re: 88 marathon carburetor question

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Originally Posted by Awesomesilverado View Post
That answers my question and I am sure it will help others who may have wondered, Thanks fellers!!!!
Have fun with that cart, 88 is the best year in the 2pg Marathon lineup IMO - it's a good base to build upon, plus it's peppier than the rest.

Quote:
Originally Posted by 1989Marathon View Post
I'm just messin with you.


You know what's funny? Even though I changed it as soon as I could, I knew you'd probably seen it and would say something. If you're like me, you've probably been called worse, huh?
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