justboughtaboat
Member
I have a 1984 18 foot cimmaron boat with the AQ125 with the penta 270 outdrive. Long story short, It's my opinion that when I bought it, it had not been in water for atleast 2 years.
What I have done:
New plugs
New wires
New cap,rotor and points.
Carb was also rebuilt.
timing set to 10 BTDC @ 600 rpm
I cannot get a full check on the advance. But the damper is marked to 30BTDC and it does advance a few degrees beyond that.
Dwell is at 59 degrees, assuming my old dwell meter is accurate.
My AQ125 will not rev beyond 2100 rpm when on the lake. At 2100 rpm the engine purrs like a well fed kitten. Aside from a small stumble and occasional carb back fire, it revs smoothly and quickly. And MPH speeds seem to be around 25mph I guess. But 2100 rpm is all I can get from her. As a result the boat NEVER planes out. I do not know of the pitch of the prop. I can only assume it is the original prop. It seems impossible for a wrong prop to cut 2000 rpms off of an engines max revs but, I know very little about boats. And I don't think the fine tuning I need to do to get rid of the stumble could be the issue either? Any suggestions would be greatly appreciated.
What I have done:
New plugs
New wires
New cap,rotor and points.
Carb was also rebuilt.
timing set to 10 BTDC @ 600 rpm
I cannot get a full check on the advance. But the damper is marked to 30BTDC and it does advance a few degrees beyond that.
Dwell is at 59 degrees, assuming my old dwell meter is accurate.
My AQ125 will not rev beyond 2100 rpm when on the lake. At 2100 rpm the engine purrs like a well fed kitten. Aside from a small stumble and occasional carb back fire, it revs smoothly and quickly. And MPH speeds seem to be around 25mph I guess. But 2100 rpm is all I can get from her. As a result the boat NEVER planes out. I do not know of the pitch of the prop. I can only assume it is the original prop. It seems impossible for a wrong prop to cut 2000 rpms off of an engines max revs but, I know very little about boats. And I don't think the fine tuning I need to do to get rid of the stumble could be the issue either? Any suggestions would be greatly appreciated.