|
|
|
|
#1
|
|||
|
|||
My Dad had a 1972 Mercury 80 h.p. which looks exactly like that motor but with red instead of blue trim. Merc did not change those 4 and 6 cylinder motors for quite a while. It was a great motor for about 6 years but then starting having electrical issues. Dad was frequently changing "power packs." He was a PITA with Mercury though, and somehow kept getting Mercury to replace them at no charge.
|
|
#2
04-20-2011, 07:05 AM
|
||||
|
||||
|
Well I have my last couple of parts trickling in from boats.net for the Merc, hope to take a whack at getting it running either this weekend or next week. Right now I am working on some fiberglass repair on the bottom of the McKee, should keep me busy for a bit!
-Svence
__________________
1984 V-20 Steplift 1998 Johnson 175
|
|
#3
05-02-2011, 06:59 AM
|
||||
|
||||
|
She runs...well sorta. Got everything bolted on, carb leaks fixed, fuel line fixed, starter on, gased her up and she ran. Was shocked to be honest as it fired up the first crank of the key. Now the problem is she won't stay running. I think it may be a fuel pump issue as if I keep priming the bulb it stays running, if not I get about 15 seconds before she dies out on me. What I don't understand is the fuel pump on these carbs, how the hell do the work? Where do they get their pulse from to pump? I am used to seeing either an electric pump or a line from the crankcase pulsing the diaphrams, any ideas?
-Svence
__________________
1984 V-20 Steplift 1998 Johnson 175
|
|
#4
05-02-2011, 07:37 AM
|
||||
|
||||
|
Pulse comes from the front half, where the carb bolts to the intake, no special lines. There should be a special base gasket that has corresponding holes to the ones in the intake and carb that all line up. I know it to be this way on some.
|
|
#5
05-02-2011, 07:41 AM
|
||||
|
||||
|
Look at part 42 in the schematics. It shows the little hole next to the throat of the carb.
|
|
#6
05-02-2011, 07:57 AM
|
||||
|
||||
|
Great, unbolting the carbs again!!!! So that little hole pulses the diaphrams in the pump to fill the bowl, got it. I am finishing up the fiberglass work today and should be able to focus on the engine later on this week so I can really troubleshoot the problem. Thanks for the help.
-Svence
__________________
1984 V-20 Steplift 1998 Johnson 175
|
|
#7
05-04-2011, 06:27 AM
|
||||
|
||||
|
Got some time yesterday to look at it. It is definitely something with the fuel delivery as I can just continuously pump the ball and it will stay running. Now before I pull both carbs is there anyway to test the fuel pumps to see which (if only one...) is bad? The carbs I have include the fuel pump so I can't get a pressure gauge between the pump and the bowl and I don't know how else to test just one pump at a time because it's just a T before the two pumps. Any ideas?
-Svence
__________________
1984 V-20 Steplift 1998 Johnson 175
|
 |
| Thread Tools | |
| Display Modes | |
|
|
Hybrid Mode
