I have a 86 ford f250 with a straight 6. just bought it from the original owner and he said it is having carb problems. It starts, just won't turn over. He said the only problem is the carbs need cleaning. The only way to get it started, if it has been sitting for a while is to spray the carb while starting. Does his diagnosis sound right to you and if so, how hard is it to clean the carburetor.

Marvin

• 85242 Answers
• Posted on Oct 19, 2008

SOURCE: Carb

When you set the choke there are many adjustments, most require linkage rod binding and a choke angle guage, also there is a cold high idle setting when the choke is on, all of these adjustments are different for each carburetor number, the carb number is stamped on the carb, there are 20 or so numbers of carbs for your truck they are called calibrations, My suggestion to you is to get the number off your carb and buy a rebuild kit made by Jiffy, they are the best and provide detailed instructions for each carb number covered by the kit.

SOURCE: '86 nissan trk inconsistent idle(hi,lo,lopes)z24 carbed

internal vacuum leak in carb. replace with weber carb you will be very happy

SOURCE: 1987 Ford F250 XLT Lariat stopped out of the blue.

float stuck in carb,bad fuel pump or filter

SOURCE: Carburetor Tuning Mitsubish.

As far as i know, original stock carburetor for Lancer 1989-1992 engine 4G15 12 valve is Aisan Variable Venturi. It have 3 screws :
- air-fuel mixture screw
- main jet adjusting screw
- idle adjusting screw

and here's the document you may need :
http://www.mitsubishi-motors.kiev.ua/info.php?id=20
http://www.lilevo.com/mirage/

Good luck !
Winz

SOURCE: my 86 f250 460 engine has hard time starting; New

Check the choke in the carb, might stay stuck in the open position when engine cools down. After the engine is cold, check and see if the choke is closed, if not close it by hand, and see if that works.