Re: Running power condition
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Posted by Ed Mc. (18.104.22.168) on July 27, 2005 at 12:23:04:
In Reply to: Running power condition posted by Ted Everett on July 27, 2005 at 08:59:11:
You sure the hi-speed mix is set right? You don't want to run it too lean as the motor'll 'peter out' after a while. Dismantle the connecting linkage on the hi-speed needles, such that you can set them one at a time. Find the rich-lean range for each needle and then leave them a tad on the rich side.
Another common problems with this model is the ign coil, if it's not new replace it. Don't even bother with a used coil since most if not all will be bad. I fought and fought an old Starflite 75 V4 until I replaced the coil, then it ran like a Swiss watch!
A blown or leaking head gasket will push exhaust out into the water jacket and cause loss of coolant in the powerhead. Check compression.
Did you leave the poppet valve(s) in when you took out the thermostat?
Do you have a good solid flow of water coming out of the exhaust relief at all times? If so, you should be getting adequate water thru the powerhead.
Without a thermostat it'll run quite cool. The exhaust plate should be stone cold, maybe after a hi-power run it'll be a bit warm but if you're getting lots of water thru the powerhead, no more than that.
Feel the block, both sides should be close to the same temp, if one side is very hot it's got problems.
Both sets of points gapped properly, new rotor, etc?
Did you synchronize the carb/magneto linkage per the book? This is real critical and these won't run right unless it's done.
Anyway, that's about all I can think of right now, let us know how it goes.............ed
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