Lou C
Supreme Mariner
- Joined
- Nov 10, 2002
- Messages
- 12,815
not its not that is a 4bbl Quadrajet!
look at the first pic I posted....
not its not that is a 4bbl Quadrajet!
Cool thanks! My original worry was it was only hitting about 3500 WOT and a buddy was saying it was the wrong carb but obviously he don’t know lol
Yup you’re right! My original worry was it’s only hitting 3500 wot. It doesn’t bog or stutter so I’m a little scared to tare into the carb this close before boating season here in ks never working in carbs before. Might let her ride thru the season and try to work on it next winter...idk tho what would you suggest?
Suggest that you do what Chris suggested to determine the cause of your low WOT, especially compression test, plugs, other ignition stuff depending on your setup. Also verify that your tach reading is correct. 3500 RPM WOT means something is seriously wrong with your setup, and you have potential to screw it up more if not corrected.
I’ve got a compression tester so I’ll do that in the morning as well as check the plugs. When I bought it it came with the msd ignition box which the guy I bought it from has bypassed. Tried looking up how to hook it back up but can’t find anything for that old. How would I verify the odometer is correct? It is a different motor from the boat so maybe that’s my problem? I guess it could be the throttle linkage because I did adjust it so it would idle but seems to be idling high what rpm should it be idling at?
If the MSD box is bypassed, what system is running the engine?
How do you know its age? and can you give us more details on the system? (Like a model number, or some way to identify it)
Boat's generally run by engine hours, not odometers. Most boats don't have odometers (I've not seen one, but they may exist)...
Boat manufacturers don't make engines, they ONLY make boats. They ALL buy engines in from marine engine suppliers, like Mercruiser, Volvo, etc. Being not the original engine is NEVER the problem.
There is a correct procedure for adjusting idle. I suggest you get a hold of Merc service manual #9 and have a good read. In the meantime, the idle is 650-700rpm, in forward gear, in the water, unrestrained (ie, not tied to a jetty!).
)Currently power is ran straight to the coil then to the distributor.If the MSD box is bypassed, what system is running the engine?
How do you know its age? and can you give us more details on the system? (Like a model number, or some way to identify it)
Boat's generally run by engine hours, not odometers. Most boats don't have odometers (I've not seen one, but they may exist)...
Boat manufacturers don't make engines, they ONLY make boats. They ALL buy engines in from marine engine suppliers, like Mercruiser, Volvo, etc. Being not the original engine is NEVER the problem.
There is a correct procedure for adjusting idle. I suggest you get a hold of Merc service manual #9 and have a good read. In the meantime, the idle is 650-700rpm, in forward gear, in the water, unrestrained (ie, not tied to a jetty!).
The next thing you should be doing is opening the throttle fully and removing the flame arrester (looks like an air filter) and looking at the throttle plates (you'll have to push the secondary air flaps open with your finger) and making sure the throttle plates ARE fully open. And do it with the engine NOT running. (Yes, I have seen people try to do it with the engine screaming its box off.
Chris......
. Was wondering since it is a different motor than original possibly the new motor is sending the tach reading that the original tach isn’t reading right?
Looks like it’s going straight to the distributor right? Yea the msd is completely bypassed
