Hello Afourians,
I have a 1974 C&C 27’ CCY273581073, with an Atomic 4 engine #YW# 13064-1332468. I’m not sure if this makes it a late model or not. I have an electric fuel pump and polishing filter installed. This engine is generally very clean and awesome!
This past season 2015, I’m pretty sure the engine ran for 5-30 hours without the benefit of the flame arrestor screen in position. One of the 2 screws securing the flame arrestor screen in place became dislodged and hence it swung to the side leaving the mouth of the flame arrestor housing wide open.
What works:
What does not work:
Once warm (or not), if I try to increase throttle past 25-35% without opening the choke, the engine will come to chugging stop within seconds. Even with the choke fully open, if the throttle is opened to more than 35% or so the engine will come to a slow stop.
I cannot be sure but its almost like the air to fuel mixture is not right. Too much fuel? Dirty carburetor not allowing more air when needed? Not sure.
If I open the throttle and it starts to come to a chugging halt, I can throttle back down and the engine will mostly return back to it’s smooth rhythm, if I catch it in time.
Needless to say I’ve become very attuned to listening and adjusting my levers to keep my Atomic 4 engine working. BUT this is not sustainable.
Spring if fast approaching and I am shopping around on the Moyer Marine site to sort out if/ what I will need. I’m not even sure if I need to get the early or late model carburetor servicing kit. Any advice is appreciated. What I’m trying to avoid is spending a good deal of my short Canadian sailing season not going out because of engine issues.
Thank you
C&C '27 - Pegasus, BYC, Ottawa
I have a 1974 C&C 27’ CCY273581073, with an Atomic 4 engine #YW# 13064-1332468. I’m not sure if this makes it a late model or not. I have an electric fuel pump and polishing filter installed. This engine is generally very clean and awesome!
This past season 2015, I’m pretty sure the engine ran for 5-30 hours without the benefit of the flame arrestor screen in position. One of the 2 screws securing the flame arrestor screen in place became dislodged and hence it swung to the side leaving the mouth of the flame arrestor housing wide open.
What works:
- I can start my engine without too much problem with the choke on.
- When the engine is warm, I can close the choke and the engine will run smoothly for hours as idle speed.
- I can increase or give more throttle to a certain extent…. maybe 10-35% more but I need to open (or find the right level of) choke to match the additional throttle level.
What does not work:
Once warm (or not), if I try to increase throttle past 25-35% without opening the choke, the engine will come to chugging stop within seconds. Even with the choke fully open, if the throttle is opened to more than 35% or so the engine will come to a slow stop.
I cannot be sure but its almost like the air to fuel mixture is not right. Too much fuel? Dirty carburetor not allowing more air when needed? Not sure.
If I open the throttle and it starts to come to a chugging halt, I can throttle back down and the engine will mostly return back to it’s smooth rhythm, if I catch it in time.
Needless to say I’ve become very attuned to listening and adjusting my levers to keep my Atomic 4 engine working. BUT this is not sustainable.
Spring if fast approaching and I am shopping around on the Moyer Marine site to sort out if/ what I will need. I’m not even sure if I need to get the early or late model carburetor servicing kit. Any advice is appreciated. What I’m trying to avoid is spending a good deal of my short Canadian sailing season not going out because of engine issues.
Thank you
C&C '27 - Pegasus, BYC, Ottawa
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