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Topic Title: Carb problem?
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Created On: 10/29/2007 08:03:37 AM

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10/29/2007 08:03:37 AM
jimg Admiral Posts: 367 Joined: 08/13/2006	My port engine started running crappy last week. It almost acted like it was a low battery, didn't want to turn over easily. Once started, it wants to idle up around 1100 rpm and won't come down. it is blowing fuel out of the exhaust. After a spark plug change, and a slight adjustment of the timing, I cranked her up again and same thing. I still have the holley 4 brl, double pumpers on and was wondering what some of you may think the problem is. Do you think it is the float stuck open or something like that? I manually closed the choke, but it still idles at between 1000 and 1100 rpm. I can't get it to idle down, and it is sending raw fuel out the back. Any help or ideas would be appreciated. ------------------------- Riverliver
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10/29/2007 10:49:59 AM
OLD HOUSEBOATER Super moderator Posts: 1520 Joined: 10/18/2002	Have the carb rebuilt. ------------------------- OLD HOUSEBOATER
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10/29/2007 11:00:06 AM
jimg Admiral Posts: 367 Joined: 08/13/2006	OK Old HB, . By the way, this is the boat(318's) we had given thought to changing over to 2 barrel carbs. Any thoughts on whether to do that or not? ------------------------- Riverliver
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10/29/2007 05:19:20 PM
MILLERTYME Admiral Posts: 253 Joined: 02/20/2006	Junk the holleys and install the carter AFB's the engines came with originally. If the holleys are indeed double pumpers then they are to big for the engines. i believe the smallest double pumper is 780 cfm and the carters the engine ran from the factory is 600 cfm. you will have less trouble with the Carters in the long haul. the only thing i can say about the holleys is they will always give you an excuse to open the engine hatches. ------------------------- UC FANS 1999, 52' Monticello - Miller Tyme Port of Aurora IN Edited: 10/31/2007 at 06:07:50 PM by MILLERTYME
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10/29/2007 05:27:46 PM
OLD HOUSEBOATER Super moderator Posts: 1520 Joined: 10/18/2002	Cant argue with that I liked the Carters. However you have one engine running ok so you should be able to obtain the same results with the other one. 2bbl not a good idea. You dont have to open up the 4bbls past the primarys. You might get into a situation where you need the power. ------------------------- OLD HOUSEBOATER Edited: 10/29/2007 at 05:28:49 PM by OLD HOUSEBOATER
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10/30/2007 05:39:59 AM
jimg Admiral Posts: 367 Joined: 08/13/2006	thanks guys. Where would you suggest getting the Carter AFB's? ------------------------- Riverliver
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10/30/2007 11:17:40 AM
alreadygone Admiral Posts: 792 Joined: 02/07/2004	As already stated, JUNK the Holleys. Forget 2bbls. Go AFB. Try marineengine.com , or call Marysville for a dealer list. Often one farther away may give a better price to get your business. Bbo ------------------------- I carry a gun because it's too tiring carrying a cop.
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10/31/2007 04:15:57 PM
jimg Admiral Posts: 367 Joined: 08/13/2006	Update: I took the holley off and when looking it over, spotted a small peice of gasket material lodged in the secondary, holding the butterfly open about 3/16". ......Yep, I smiled, did a little clean up work on the gasket that had separated below the riser, put it back on, fired her back up to listen to it purrr like it used to. some days you just can't help it.....LOL thanks to the replies fellers. ------------------------- Riverliver
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10/31/2007 05:19:20 PM
OLD HOUSEBOATER Super moderator Posts: 1520 Joined: 10/18/2002	Nice to win one once in a while. ------------------------- OLD HOUSEBOATER
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10/31/2007 07:39:58 PM
alreadygone Admiral Posts: 792 Joined: 02/07/2004	Better hold onto your arse!!! Next time it'll be Break Out A COUPLE Thousand!!!!! Bob ------------------------- I carry a gun because it's too tiring carrying a cop.
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