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82BlueMCs&s
06-10-2012, 07:32 PM
I have a 1982 S&S (my birth-right) with the 351 Windsor. The original carburetor was a 600 cfm, but my Dad thinks the one he used to have on it was a 650 cfm Holley. I'm looking for any suggestions for the best match and the reasons for it. I also need to get a new prop and would like inputs for whether to get a 4-blade or stick with the 3-blade. Thanks for any help!

Cloaked
06-10-2012, 08:04 PM
I have a 1982 S&S (my birth-right) with the 351 Windsor. The original carburetor was a 600 cfm, but my Dad thinks the one he used to have on it was a 650 cfm Holley. I'm looking for any suggestions for the best match and the reasons for it. I also need to get a new prop and would like inputs for whether to get a 4-blade or stick with the 3-blade. Thanks for any help!I'd look to the (original) Holley 4160 carb and install a 1" spacer plate between the base and the intake manifold (unless it already has one). If you do this, you'll need two gaskets and possibly a new setup on the fuel line. The OEM fuel lines are not available from anywhere I look.

Acme 541 (left hand) 13 x 12 / 1" diameter bore / keyed shaft / three blade prop. These props seem to work best for that era boat. I have ran this prop on all models 79 - 85 without a hiccup. The CNC process sure does take a lot of vibration out of the driveline.


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thatsmrmastercraft
06-10-2012, 08:44 PM
4160 is definitely the way to go. Doesn't take too much effort to bend a 30" line to fit. Cost is about $6 and need to cut about 2" off and re-flare. Alternative is a braided stainless line, but the metal line is more period correct...if that makes a difference.

ted shred
06-10-2012, 09:52 PM
Is it a powerslot?

tim79mc
06-10-2012, 09:58 PM
I've got a 79 with 351. I would second the new 4160 carb. I replaced mine about 10 years ago - the boat would barely start, especially when hot and ran rough. New carb with spacer/gaskets fixed everything up. Today still runs and starts right up without messing around with the throttle.

My prop is 13x12.625, 1" CNC from Acme. I had called them and asked for the right prop and it's been working out great for several years.

82BlueMCs&s
06-11-2012, 12:20 PM
Gents, thanks for the info.

Ted, it is a powerslot.

ted shred
06-11-2012, 06:53 PM
A powerslot usually spins a 14x18 prop on a 1 1/8 in shaft.

82BlueMCs&s
09-23-2012, 09:17 PM
I finally got the Holley carb from National Carburetor. I love the price but was a little disappointed that the new bowls didn't have external adjustors... Boat cranks great cold but won't stop and re-crank once it gets hot. I'm wondering if it can just be because the gas in the tank is old, even though its had Stabil added to it multiple times (gotta love this terrible ethanol gas...)

SeaCup
09-23-2012, 09:49 PM
If you are having any sour fuel issues throw in a bottle of Startron, it works great and even Walmart sells it. I thought Skidim had the prebent fuel line? If you really need one I think I have a new one in the garage somewhere.

http://www.skidim.com/products.asp?dept=1117

thatsmrmastercraft
09-24-2012, 10:05 AM
I finally got the Holley carb from National Carburetor. I love the price but was a little disappointed that the new bowls didn't have external adjustors... Boat cranks great cold but won't stop and re-crank once it gets hot. I'm wondering if it can just be because the gas in the tank is old, even though its had Stabil added to it multiple times (gotta love this terrible ethanol gas...)

The OE Holley marine 600's did not have external float adjustments. Not sure why they don't and the larger CFM Holley's do.

How old is the fuel? I don't think you can continue to add fuel stabilizer and keep gas with ethanol going.

Did you mean it starts and runs fine from a cold start, but won't re-start with a warm engine? If that's the case, is the choke opening fully?

82BlueMCs&s
09-26-2012, 01:03 AM
Choke opens fine, I think it's just this unbelievably crappy gas that we are forced to by...

thatsmrmastercraft
09-26-2012, 10:33 AM
For what it's worth, I haven't had any fuel issues this year. I try to manage my fuel to be low at the end of each time out and have been adding ethanol treatment at every fill.

DH9441
09-27-2012, 05:23 PM
Any luck?

82BlueMCs&s
09-30-2012, 07:08 PM
Took the boat out and ran it for about an hour today. It's easy to start when cold but I have to feather the throttle quite a bit to get it to start when at temperature. It also lopes quite a bit below 1000 rpm...

millpondkid
10-01-2012, 09:54 PM
Is it brand new or a reman? Bowl floats could be off

thatsmrmastercraft
10-01-2012, 10:21 PM
Have you checked for vacuum leaks around the base of the carb?

Masterfull
10-01-2012, 10:53 PM
I've seen washers left on carb studs with the gasket and carb installed on top of them.....Unnoticeable to the eye but spray a little carb cleaner around base of carb while she was running and you quickly knew where the problem lies...