The Ford Barn - View Single Post - Hesitation when accelerating from stop

rotorwrench · 12-17-2019, 06:54 PM

Where I've had problems with the similar 885 carbs for my 51 Mercs is with the vacuum circuit for the power valve actuator. If it has even the slightest leak, the power valve won't work right. Everywhere there is a gasket flange involved is a potential leak source. Don't you just love them high float bowl Holley carbs. When they work right they will stay that way for a long time but getting them right can be difficult to say the least.

The 885 has the vacuum circuit passing through the top shroud so getting it sealed can be a bear. The 1901 goes through the body but it's there just the same.

12-17-2019, 06:54 PM	#9
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 16,440	Re: Hesitation when accelerating from stop - Holly 1901 carb Where I've had problems with the similar 885 carbs for my 51 Mercs is with the vacuum circuit for the power valve actuator. If it has even the slightest leak, the power valve won't work right. Everywhere there is a gasket flange involved is a potential leak source. Don't you just love them high float bowl Holley carbs. When they work right they will stay that way for a long time but getting them right can be difficult to say the least. The 885 has the vacuum circuit passing through the top shroud so getting it sealed can be a bear. The 1901 goes through the body but it's there just the same.