superwooter
Petty Officer 2nd Class
- Joined
- Oct 12, 2009
- Messages
- 167
hi,
i've recently had the carbs cleaned on my 1978 mercury 700 70hp thunderbolt engine. it now runs smoothly from idle to high rpm and back again, something that it hasn't done since i acquired the boat a couple months ago. now the problem is that it dies when i put it in gear if i move the MerControl slowly or at a normal movement. however, if i very quickly shove the control through the engagement portion of the movement of the lever, it does fine. it just seems to bog down while the prop is engaging if i move it normally. if you're not familiar with the old MerControls, it has nearly 90 degrees of motion just to engage the prop before the throttle actually starts to be increased.
after cleaning the carbs, we had to turn out the idle screw from the factory 1 1/2 turns out to 3 full turns. it idles at about 1100 rpm. should i try turning out the idle screw another half turn or so to prevent the engine from dieing while the prop is being engaged or should i just live with what i've got and shove the lever forward quickly to get it past the engagement and on to the throttle before it dies? like i said, that works but it seems like it should work better than that.
here's the link to my thread about getting the engine to idle correctly...
http://forums.iboats.com/showthread.php?t=360910
thanks for your input,
wooter
i've recently had the carbs cleaned on my 1978 mercury 700 70hp thunderbolt engine. it now runs smoothly from idle to high rpm and back again, something that it hasn't done since i acquired the boat a couple months ago. now the problem is that it dies when i put it in gear if i move the MerControl slowly or at a normal movement. however, if i very quickly shove the control through the engagement portion of the movement of the lever, it does fine. it just seems to bog down while the prop is engaging if i move it normally. if you're not familiar with the old MerControls, it has nearly 90 degrees of motion just to engage the prop before the throttle actually starts to be increased.
after cleaning the carbs, we had to turn out the idle screw from the factory 1 1/2 turns out to 3 full turns. it idles at about 1100 rpm. should i try turning out the idle screw another half turn or so to prevent the engine from dieing while the prop is being engaged or should i just live with what i've got and shove the lever forward quickly to get it past the engagement and on to the throttle before it dies? like i said, that works but it seems like it should work better than that.
here's the link to my thread about getting the engine to idle correctly...
http://forums.iboats.com/showthread.php?t=360910
thanks for your input,
wooter