85 S&S hesitate on holeshot

[xtnkshun]

Good evening TT'ers,

Took my brand new used 85 out to the lake last weekend for the first time and she performed quite well. She's not nearly as big a restoration as some of the amazing boats I've seen here, but she needs a little love.

Motors cranks easy...cold or hot. Idles good. Runs good at speed and maintained around 170 degree temp all day. Only issue I had was a bog / hesitation on the holeshot early in the day. If I eased into the throttle she was fine. And the bogging problem got less and less as the day went on. The second day it was the same way. Bog in the morning and hardly any after running a while.

I'm certainly not an engine guy, but I felt like she was getting too much fuel at the holeshot.

Any thoughts gurus?

P.s. I burned through about 2/3 of a tank of fuel in 2 days...maybe 2-3 total hours of running. Normal?

[madcityskier]

Depends how hard you're running her. For general use I see roughly 4-5 gph. Might want to make sure the carb is clean for a starting point.
Oh, and welcome to the MC

[madcityskier]

By the way, congrats on the boat. We'd love to see pictures.

[thatsmrmastercraft]

Need to go through the basics first. Spark plugs, distributor cap & rotor, plug wires, fuel filter, check timing, and new points & condenser (if not already converted to electronic ignition). Next I would check to see that the choke is adjusted properly and opening completely within a minute or so. Then I would check for a carb base gasket leak. Could be carb related, but I suspect if you work through these things you will correct the situation. Good luck. Post some pics of the boat please.

[Butthead]

Check fuel filter .

[xtnkshun]

Sorry for the delay guys. I've been battling another issue with her.

http://www.mastercraft.com/teamtalk/...ad.php?t=50139

Here is a quick pic I snapped. She still needs some work, but I'm making progress. She got new plugs, new wires, already had electronic ignition, new blue top battery, new bilge, new flame arrestor. PO had straight wired the entire dash (bypassing fuses)...that has also been fixed. Still having the hesitation on hole shot, but it does appear to have gotten slightly better.

Timing is next..although I have never done that. I realized this weekend that the holley carb might actually be an automotive carb rather than the marine version. It doesn't have the yellow finish of the marine carbs, but I need to check the PN to be sure.

I also noticed that the vent nipple on top of the fuel pump that connects to the flame arrestor via a tube is missing also. I put my finger over the hole on the fuel pump where the nipple was while she was running, but that didnt really seem to do anything.

[johnlanguab]

If the carb has U shaped overflows on the top, it's likely a marine carb.

[thatsmrmastercraft]

Marine 4160 looks like this.

[thatsmrmastercraft]

Dead give-away to an automotive carb is un-blocked float adjustment screws.

[xtnkshun]

Excellent info! Looks like mine is in fact marine. The float adjustments are blocked. The front one has some kind of hard epoxy covering the top. None on the back.