surging
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Engine Repair
Forum Discription: Engine problems and solutions
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=2421
Printed Date: November-23-2024 at 4:18am
Topic: surging
Posted By: southwind 20
Subject: surging
Date Posted: September-11-2005 at 12:15am
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My 1976 Southwind 20 started surging ; actually almost cutting all the way out and then accelerating back and doing the fast slow thing. At about 700 rpm everything is ok with only a little miss every once in awhile. I am thinking the fuel pump. I have only run it once since the filter was changed and this doesn't seem like an ignition problem. Starts and idles ok. It has the stock pump with seperator bowl. Am I looking in the right direction? Has the OMC 250hp 350 ci GM engine. THANKS! ------------- Git One ON! |
Replies:
Posted By: JEFF KOSTIS
Date Posted: September-11-2005 at 12:45am
If its a lack of fuel due to a problem, it will usually die (fade-not skipping) then come back to life when you let off on the throttle. Cool Engine! They are pretty rare! By the way, if its the fuel pump and you go to replace it, beware that you cant buy the exact one with the filter in it (at least I couldnt find a new one). It should be a carter fuel pump. The replacement substitute I got bolts up fine but the pressure was a bit higher causing the carb to overflow when hot. Instead of trying to find a shorter rod, I built a 1/8" shim for it bringing the pressure to spec. a quick flow check of yours can be done by Unhooking the steel line to the carb and put a hose over it to a can. Run/turn it over and see what you get for fuel. If its that bad, you will hardly get any. Also remember theres a filter in the carb as well as the pump. Dont forget to check the flow into the pump. However, being as old as it is, its not a bad idea to change. Ours was still good but the diaphram was badly cracked. Good luck!! ------------- MUSTANG COUNTRY http://www.correctcraftfan.com/diaries/details.asp?ID=1074 - 1974 Mustang 17 http://www.correctcraftfan.com/diaries/details.asp?ID=1093 - 1976 Mustang 17 |
Posted By: Guests
Date Posted: September-11-2005 at 6:17am
| U might try turning the idle screw on the carb a little ??? |