Hello all,
You have been a big help to me so far and I was hoping that someone may have come across this issue that I am seeing. Bought this motor and been working on it a little at a time and I think I have the issue narroed down to a fuel problem.
On this motor the comprssion on all 4 is good, spark is good, carbs have been rebuilt.
The problem that I have is the motor dosent seem to be getting fuel, after cranking it several times and nothing, I pulled the plugs and they are all bone dry, no matter how much you turn the engine the plugs stay dry, so I pulled the front off and checked the reeds, all which are functioning correctly and no corrosin or damage to them, replaced the head and turned the motor and there is great suction from the reeds. I put the carbs back on, turned the motor and I am not seeing any fuel what so ever inside the carbs, the bowls of the carbs are full on both and the primer ball is rock hard. I think this was an existing issue from the previous owner as there is a new fuel pump installed. I pulled the feed from the fuel pum and turned the engine, there were spurts of gas as I would imagine seeing, not quite sure how much pressure it should be but if I put my finger over the line ant turn the engine it was NOT enough pressure to push gas past my finger. Now I can see that these fuel pumps operate on vaccume, so I disconnected the vacume line and there were pulses of suction, not stong but enough to feel.
So that is where I am right now with this motor and was hoping that someone has been there done that type of deal. So a quick list of things that have been checked.
Compression 120 on 3 and 105 on 1
Spark, nice spark on all 4 which jump the 7/16 gap.
Reeds, all function and good condition.
Carbs, all clean and bowls filled with gas. (When i look into the carbs during engine crank i see no gas at all)
Fuel pump, new from previous owner, thats all I know about that.
Thank you for anyone having any idea as to what this issue can be, im stummped!
jeremy
You have been a big help to me so far and I was hoping that someone may have come across this issue that I am seeing. Bought this motor and been working on it a little at a time and I think I have the issue narroed down to a fuel problem.
On this motor the comprssion on all 4 is good, spark is good, carbs have been rebuilt.
The problem that I have is the motor dosent seem to be getting fuel, after cranking it several times and nothing, I pulled the plugs and they are all bone dry, no matter how much you turn the engine the plugs stay dry, so I pulled the front off and checked the reeds, all which are functioning correctly and no corrosin or damage to them, replaced the head and turned the motor and there is great suction from the reeds. I put the carbs back on, turned the motor and I am not seeing any fuel what so ever inside the carbs, the bowls of the carbs are full on both and the primer ball is rock hard. I think this was an existing issue from the previous owner as there is a new fuel pump installed. I pulled the feed from the fuel pum and turned the engine, there were spurts of gas as I would imagine seeing, not quite sure how much pressure it should be but if I put my finger over the line ant turn the engine it was NOT enough pressure to push gas past my finger. Now I can see that these fuel pumps operate on vaccume, so I disconnected the vacume line and there were pulses of suction, not stong but enough to feel.
So that is where I am right now with this motor and was hoping that someone has been there done that type of deal. So a quick list of things that have been checked.
Compression 120 on 3 and 105 on 1
Spark, nice spark on all 4 which jump the 7/16 gap.
Reeds, all function and good condition.
Carbs, all clean and bowls filled with gas. (When i look into the carbs during engine crank i see no gas at all)
Fuel pump, new from previous owner, thats all I know about that.
Thank you for anyone having any idea as to what this issue can be, im stummped!
jeremy