Guest Posted June 24, 2021 Share Posted June 24, 2021 anyone in Southern NH that can help tune my PCM 351 with 4160 Holley. Can't find a good mechanic. I did a rebuild and now I am having issues tuning the carb. PV, needle and seat seem good but I am still flooding at low rpm... will not idle. would love to water tune if there is anyone local that would like to give me a hand... Link to comment Share on other sites More sharing options...
Baller S1Pitts Posted June 24, 2021 Baller Share Posted June 24, 2021 Is the power valve the original or one from a kit? Either way if it is the old one it could have failed or if it is a new one from a kit it could be the wrong value and remaining open. Also float level could be out and the excess fuel is pouring into the primary or secondary venturies, I would check out the drag racing scene in your area. Bound to be a few hot rod guys around who know holley carbs. Link to comment Share on other sites More sharing options...
AndyP Posted June 24, 2021 Author Share Posted June 24, 2021 I have tried both. The original one worked perfect before the rebuild so after I tried the new one and had issues I put the old one back in. no luck. I have tried adjusting the floats several times. It is now getting to the point to where it seems as though there would be very little fuel in the bowl. I will try and see if I can find an old time hot rod guy in the area. thanks for the response! Link to comment Share on other sites More sharing options...
Baller BraceMaker Posted June 24, 2021 Baller Share Posted June 24, 2021 Flooding is interesting are you setting floats with the carb sitting on an angle or flat? Too often car guys bench tune floats on the bench and you need something like 18 or 20 degrees of tilt. Link to comment Share on other sites More sharing options...
Baller jhughes Posted June 24, 2021 Baller Share Posted June 24, 2021 Leaky float? Link to comment Share on other sites More sharing options...
AndyP Posted June 24, 2021 Author Share Posted June 24, 2021 @BraceMaker Engine is tilted but the marine 4160 does not have external adjustments. I have to remove the bowl and bend the tab each time. Right now it is far from level. @jhughes I have tried it both with the old and new needle and seat. blow test seems to work. Link to comment Share on other sites More sharing options...
Baller LeonL Posted June 24, 2021 Baller Share Posted June 24, 2021 I think @jhughes is asking if the float is leaking gas and not "floating" fully. Link to comment Share on other sites More sharing options...
Baller Bdecker Posted June 24, 2021 Baller Share Posted June 24, 2021 @andyp - where in southern NH is the boat? Might know a couple guys that can help. I’m definitely not one of them if you want it to run at all… Link to comment Share on other sites More sharing options...
AndyP Posted June 24, 2021 Author Share Posted June 24, 2021 @LeonL Well when I blow into the fuel inlet and raise the float it stops the air. @Bdecker I am in Spofford NH outside of Keene Link to comment Share on other sites More sharing options...
Baller VermontSkier Posted June 24, 2021 Baller Share Posted June 24, 2021 @AndyP I live and ski over in Brattleboro, there is a good mechanic over in Hinsdale at Norms Marina, his name is Greg. Not sure how busy he is but that would be the place to do an on-water tune since they are right on the river. Good luck! Link to comment Share on other sites More sharing options...
AndyP Posted June 24, 2021 Author Share Posted June 24, 2021 @VermontSkier Thank you I will look him up Link to comment Share on other sites More sharing options...
Baller Jmoski Posted June 24, 2021 Baller Share Posted June 24, 2021 You can try NECC boats in Rochester, former CC dealer for decades, they had great service tech’s. Possible that’s where you boat originally came from when new. Link to comment Share on other sites More sharing options...
Baller pcmcon729 Posted June 24, 2021 Baller Share Posted June 24, 2021 @AndyP Consider contacting Craig Warner at NECC in Gonic NH. He was a Correctcraft Deal since the 60's. He is the most knowledgeable person in NH regarding the older Nautiques. He is a relative of the Meloon family 603-332-5739. Link to comment Share on other sites More sharing options...
AndyP Posted June 25, 2021 Author Share Posted June 25, 2021 @Jmoski boat is from CA but this sounds like a great contact. Thank you!! @pcmcon729 sounds like this is the same place as Jmoski suggested. I will definitely give them a call. The help is much appreciated Link to comment Share on other sites More sharing options...
Baller LeonL Posted June 25, 2021 Baller Share Posted June 25, 2021 @AndyP probably not your problem anyway, but the suggestion from @jhughes relates to fuel in the float. Your moving the float up and down manually has no impact on this situation. If there is fuel in the float it will ride lower in the bowl and thus higher fuel level. Link to comment Share on other sites More sharing options...
AndyP Posted June 29, 2021 Author Share Posted June 29, 2021 @LeonL ahhhhh right. lol... yeah, it has the nitrophyl floats. I guess they could be saturated. Link to comment Share on other sites More sharing options...
Baller LeonL Posted June 30, 2021 Baller Share Posted June 30, 2021 What carb again? Saturation was a problem with Q-Jet floats. I've never seen a Holley with anything but metallic floats. Not that they don't, it's just that I've never seen them. Admittedly, I'm an old school drag racer and haven't delved into carbs in some time. Link to comment Share on other sites More sharing options...
Baller TEL Posted June 30, 2021 Baller Share Posted June 30, 2021 @AndyP is it leaking at idle? If it is you may have clogged air bleeds, back out the air bleed screws on each side take carb cleaner with the little straw and spray, it should come out in side of air horn hole on each side. (do not look down air horn) eye full of carb cleaner not fun. Link to comment Share on other sites More sharing options...
AndyP Posted July 1, 2021 Author Share Posted July 1, 2021 @LeonL It is a Holley 4160 @TEL air bleeds are clear. cleaned and re-cleaned when I had it all apart. Then cleaned again before I put it back together. Link to comment Share on other sites More sharing options...
Baller vtjc Posted July 1, 2021 Baller Share Posted July 1, 2021 It is a bit of a drive, but I would recommend Ski Marine in Williston VT. Ken operates is a great small independent marine repair shop that likes to work on inboards. http://www.skimarine.net/ Link to comment Share on other sites More sharing options...
.webp.a30f66e5f4553a0ea06e4fe12520951c.webp)
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now