simonnevill
Recruit
- Joined
- Apr 14, 2009
- Messages
- 2
Hello Everbody,
History - Picked up a 1965 Mercury 650, 4 Cylinder, Serial # 2018238, for $250 from Ebay a couple of months ago. Intention was to use this one for 'parts', however the Compression was actually better than the one I had (identical model and year), so I decided to use this one to replace the one I had. Which ran very rough. Which is the reason for this project.
Here's what I've done -
1. Rebuilt both Carbs. Condition of carbs prior to rebuild was very good, a good sign of general condition of engine?
2. Rebuilt Water Pump. Again, original Impeller was in very good condition.
3. Took apart Distributor and cleaned / adjusted everything, including the Points.
4. New Spark Plugs.
5. Checked all wiring, etc. (Boat has 2 new Batteries, and all new wiring).
6. Cleaned out fuel tank, replaced with fresh fuel. Mixed 40:1 with oil. Added some Seafoam. Fuel line from tank to motor is new.
7. I did NOT 'test' or rebuild the 2 Fuel Pumps.
Started it up last night, and it started IMMEDIATELY! AWESOME! (This is the first time i have EVER worked on an engine.....)
But, Here's the problem - It is IDLING far too high. I recognized this immediately, and obviously shut the engine off immediatley. Obviously I had the Rabbit Ears on the lower unit. Tachometer (rev-counter) confirmed idle speed was around 2,000 RPM.
Here's what I've done to try to correct the high-idle -
1. Referring to the Seloc manual, I made sure both idle-adjust screws (on Carbs) were turned 1.5 times anticlockwise, from the 'closed' position.
This didn't lower the idle-speed.
I read that I should adjust the idle-screws that make contact with the (Magneto assembly?), however when I started doing this I realised it would take more than a few seconda to play around with it, and I am very nervous to keep the engine running at 2,000 RPM with just Rabbit Ears. It is also really loud, and I have already had complaints from the neighbourhood association to remove the boat from the driveway, so I don't want to push my luck.....!
What should I do next?
Thanks, Simon Nevill.
History - Picked up a 1965 Mercury 650, 4 Cylinder, Serial # 2018238, for $250 from Ebay a couple of months ago. Intention was to use this one for 'parts', however the Compression was actually better than the one I had (identical model and year), so I decided to use this one to replace the one I had. Which ran very rough. Which is the reason for this project.
Here's what I've done -
1. Rebuilt both Carbs. Condition of carbs prior to rebuild was very good, a good sign of general condition of engine?
2. Rebuilt Water Pump. Again, original Impeller was in very good condition.
3. Took apart Distributor and cleaned / adjusted everything, including the Points.
4. New Spark Plugs.
5. Checked all wiring, etc. (Boat has 2 new Batteries, and all new wiring).
6. Cleaned out fuel tank, replaced with fresh fuel. Mixed 40:1 with oil. Added some Seafoam. Fuel line from tank to motor is new.
7. I did NOT 'test' or rebuild the 2 Fuel Pumps.
Started it up last night, and it started IMMEDIATELY! AWESOME! (This is the first time i have EVER worked on an engine.....)
But, Here's the problem - It is IDLING far too high. I recognized this immediately, and obviously shut the engine off immediatley. Obviously I had the Rabbit Ears on the lower unit. Tachometer (rev-counter) confirmed idle speed was around 2,000 RPM.
Here's what I've done to try to correct the high-idle -
1. Referring to the Seloc manual, I made sure both idle-adjust screws (on Carbs) were turned 1.5 times anticlockwise, from the 'closed' position.
This didn't lower the idle-speed.
I read that I should adjust the idle-screws that make contact with the (Magneto assembly?), however when I started doing this I realised it would take more than a few seconda to play around with it, and I am very nervous to keep the engine running at 2,000 RPM with just Rabbit Ears. It is also really loud, and I have already had complaints from the neighbourhood association to remove the boat from the driveway, so I don't want to push my luck.....!
What should I do next?
Thanks, Simon Nevill.