TTFullTimer
Member
After reading a lot of threads on here I have gleaned some good info on setting the idle needles, maybe the idle RPMs with the trunnion but that is still not 100 percent. One trial led to decent idling but did not allow the cam to go to full open on the butterflies.
I have the service manual and J Reeves says not every number in there may be correct. For example the seating and backing out of the idle needle valves. Manual says start at 5/8 and Joe says start at 1 and 1/2 turns out.
Service manual says set the rod that goes between the throttle lever driven by the cable from the control to the cam that actuates the carb butterflies at 4 and 31/32 inches. Is that correct?
I modded my ignition using the MSD and dual coil setup with primaries in series with one secondary feeding the distributor and the other grounded. Seems to be no spark problems with that.
So far I have not gotten a decent smooth low rpm idle. I do get a runs great from off idle to WOT. Top RPMs are 5300 which is about as close to 5500 I am going to get without a custom prop of some kind.
The one thing that is very problematic with this motor is the lack of a means to have a high idle for warm up or to set a bit of throttle for initial cold start. I have had numerous outboards and I/O driven boats as well as a dual engine straight inboard boat. All of those had the capability to use the throttle without being in gear to get started cold or to warm up before going into gear. After a bit of reading here and some investigation into the Blue Green setup I will be installing a warm up switch. Basically a purple wire on a switch which goes to the green wire outside the rotary switch. In the on position the motor will stay in neutral and allow the the use of some throttle to warm up, clear an engine that has idled for a while, have a good starting set point. The present Start lever just does not add any real butterfly opening.
The other sticky point is the setting of idle speed with the timing advance lever. The throttle and timing advance lever are loosely tied together and it would be very helpful to have an adjustment screw that allows movement of the timing advance lever without having to move the throttle lever to a point that does not allow for proper full throttle operation. Been there done that. No fun when you have to run a half hour at no wake to even be able to try WOT. And then a half hour back to work on the settings again. I am not going to try tuning in the open waters of Lake Huron without a helper to drive the boat.
I went back to some original settings today. Wind was so bad I did not even want to try launching to do some fiddling. On the muff it started right up which is good.
Joe suggested starting this thread for any questions I may have.
I have the service manual and J Reeves says not every number in there may be correct. For example the seating and backing out of the idle needle valves. Manual says start at 5/8 and Joe says start at 1 and 1/2 turns out.
Service manual says set the rod that goes between the throttle lever driven by the cable from the control to the cam that actuates the carb butterflies at 4 and 31/32 inches. Is that correct?
I modded my ignition using the MSD and dual coil setup with primaries in series with one secondary feeding the distributor and the other grounded. Seems to be no spark problems with that.
So far I have not gotten a decent smooth low rpm idle. I do get a runs great from off idle to WOT. Top RPMs are 5300 which is about as close to 5500 I am going to get without a custom prop of some kind.
The one thing that is very problematic with this motor is the lack of a means to have a high idle for warm up or to set a bit of throttle for initial cold start. I have had numerous outboards and I/O driven boats as well as a dual engine straight inboard boat. All of those had the capability to use the throttle without being in gear to get started cold or to warm up before going into gear. After a bit of reading here and some investigation into the Blue Green setup I will be installing a warm up switch. Basically a purple wire on a switch which goes to the green wire outside the rotary switch. In the on position the motor will stay in neutral and allow the the use of some throttle to warm up, clear an engine that has idled for a while, have a good starting set point. The present Start lever just does not add any real butterfly opening.
The other sticky point is the setting of idle speed with the timing advance lever. The throttle and timing advance lever are loosely tied together and it would be very helpful to have an adjustment screw that allows movement of the timing advance lever without having to move the throttle lever to a point that does not allow for proper full throttle operation. Been there done that. No fun when you have to run a half hour at no wake to even be able to try WOT. And then a half hour back to work on the settings again. I am not going to try tuning in the open waters of Lake Huron without a helper to drive the boat.
I went back to some original settings today. Wind was so bad I did not even want to try launching to do some fiddling. On the muff it started right up which is good.
Joe suggested starting this thread for any questions I may have.