PDA

View Full Version : Won't Idle When Fully Warmed Up


starman205
09-06-2005, 10:34 AM
The last two times I was out the engine would not idle after being fully warmed up. When I came back to the dock the engine would sound like it was surging and then it would die. My guess is that it is not getting enough fuel at warm idle. The only other thing I have noticed this year that was not present in previous years is that when I accelerate from cold idle there is a slight hesitation of the engine. This does not happen when accelerating from a fullly warm idle. Start up idle is approx 700 RPM. Boat runs great above 1000 RPM. No problem with pulling slalom skiers out of deep water starts. Any suggestions on where I should start looking for the cause of this problem? I own a 93 prostar 205 with the 351 ford engine. :confused:

east tx skier
09-06-2005, 10:44 AM
When was your carb last rebuilt? Which carb is it?

If it's got a forked fuel line going in, then it's probably the Holley 4010, if not, and it's stock, it's the 4160. I had a long battle with both of these things.

A rebuild fixed the hesitation. Selling the 4010 and buying a new 4160 fixed everything. There are some who will tell you that you can make a 4010 work. Neither I nor my trusted inboard mechanic could make the Holley 4010 work for me. My only regret is not dumping that thing for the 4160 sooner.

I'll leave the mechanical details to the experts.

starman205
09-06-2005, 11:16 AM
As far as I know the carb has never been rebuilt. It has approx 490 hours on it and is the stock 4010. ETS I have previously read your threads on the 4160. How much $ is that carb, where can I get one and about how much would you think it would be to have someone install. i am moderately mechanical but this type of retrofit may exceed my expertise. :D

bigmac
09-06-2005, 11:34 AM
As far as I know the carb has never been rebuilt. It has approx 490 hours on it and is the stock 4010. ETS I have previously read your threads on the 4160. How much $ is that carb, where can I get one and about how much would you think it would be to have someone install. i am moderately mechanical but this type of retrofit may exceed my expertise. :D


$499 for the 4160 at SkiDIM..... (http://www.skidim.com/prodinfo.asp?number=RA052003)

http://www.skidim.com/images/ra052003.jpg

TCrate
09-06-2005, 09:36 PM
Starman,
If your boat runs fine above 1000 it is something in the idle circuit. The floats valve could be stuck, power valve may have a leak or just the idle circuit in general may be clogged. May want to pull the carb and clean it out. Good Luck.

east tx skier
09-07-2005, 11:24 AM
I paid $429 for the 4160 and about $12 for the single feed fuel line. I bought from skidim.com. I have heard of better deals out there. I recall about 1.5 hours of install from my local auto mechanic. After that, all I did was adjust the idle.

Again, more recently, I've heard of people who have been able to work with the 4010. I was not one of them given my level of mechanical ability and confidence. I'm told, with carbs, to a certain extent, the latter may be more important than the former. ICBW.

martini
09-07-2005, 12:00 PM
Buy it at Summit Racing (www.summitracing.com), it will be cheaper there. About $50 cheaper than at skidim.

http://store.summitracing.com/default.asp?Ntt=80319&Ntk=KeywordSearch&DDS=1&searchinresults=false&N=0&target=egnsearch.asp

starman205
09-07-2005, 01:49 PM
Is the 4160 just plug and play with the exception of the single feed fuel line or does this changeout require an adapter plate for the manifold? :)

east tx skier
09-07-2005, 02:12 PM
As far as I remember, plug and play if you have the stock manifold. Just bolts on. I still let someone do it for me, but yes, plug and play.

starman205
09-07-2005, 04:00 PM
ETS, thanks for the info, I have the stock manifold and will now search for a mechanic to do this for me. :dance: