rough rider
Cadet
- Joined
- Jan 12, 2015
- Messages
- 27
I have a 1978 Galaxy tri hull. It has a mercruiser 898 with a 305 engine. Using a rochester 2gc carb.
My problem is that it runs fine on the trailer but when it is in the water and I try to take off it just bogs down and will not get over about 2,000 rpms. This was a problem a couple years ago and I had the carb rebuilt and it fixed it but could it be anything else? I changed the plugs and wires and the coil. Then installed the old coil back on to see if it made a difference and it did not. I keep playing with the timing but it just never seems to do any good. It also seemed like it used A LOT of fuel for the time I was out tinkering. About 7 gallons for just a couple laps around the ski area. ( Probably about 3 miles total) Could it be something with the float? It has ran great for two seasons with only the basics taken care of. This time I changed the water pump in the stern drive, the coil, the plugs and new wires. Now I have a whole new problem. I should also mention that the idle mixture screws make no difference in how it runs and I have never been able to get it to run good at the suggested 8 degrees BTDC. it has always been more like 15 degrees BTDC and it would ping a little wide open but it would always start reliably and run fine other than slow out of the hole.. Any help would be great.
My problem is that it runs fine on the trailer but when it is in the water and I try to take off it just bogs down and will not get over about 2,000 rpms. This was a problem a couple years ago and I had the carb rebuilt and it fixed it but could it be anything else? I changed the plugs and wires and the coil. Then installed the old coil back on to see if it made a difference and it did not. I keep playing with the timing but it just never seems to do any good. It also seemed like it used A LOT of fuel for the time I was out tinkering. About 7 gallons for just a couple laps around the ski area. ( Probably about 3 miles total) Could it be something with the float? It has ran great for two seasons with only the basics taken care of. This time I changed the water pump in the stern drive, the coil, the plugs and new wires. Now I have a whole new problem. I should also mention that the idle mixture screws make no difference in how it runs and I have never been able to get it to run good at the suggested 8 degrees BTDC. it has always been more like 15 degrees BTDC and it would ping a little wide open but it would always start reliably and run fine other than slow out of the hole.. Any help would be great.