ADK_Boater
Petty Officer 1st Class
- Joined
- Jun 29, 2010
- Messages
- 217
Hey Everybody,
Here's an update/new problem with my '72 Johnson 85hp.
I think I have some kind of fuel delivery problem. I can't get it to fire up yet.
I cleaned every orifice in my carbs, inspected the float needle and seat, set the float level, then reinstalled them. When I had them off I peered in the motor with a flashlight, and my reed-valves looked fine (no problems that I could see). Could it be that they are not allowing fuel to reach the cylinders?
When I squeezed the primer bulb, premix flowed freely up into the float bowls (I checked to make sure). I had the vent open on the fuel tank. I choked it , and cranked it over a few times. I didn't even get a pop.
I pulled one of the plugs to see if there was fuel in the cylinder and I didn't smell much of anything. I checked the rest of the plugs, and one of them smelled faintly of gas, and a thin wisp of vapor came out of the cylinder, but not much. All lines are reconnected.
Here's what I'm thinkin'. Maybe I don't have the carbs adjusted properly. These carbs don't have low speed needles. There are two plug screws in the front of each carb. I checked the exploded parts diagram to make sure that was correct for the year. when I took the carbs apart the plugs were tight. I have no idea if the last guy who had the motor had them set correctly. I tried backing them our a full turn and trying again, but still nothing. So, how is it that the air fuel mixture would flow properly to the cylinder. The plugs being tight makes me think that there wouldn't be much of a draw.
My other thought is that I need to have the throttle opened more. The controls are from an Evinrude that had to be rewired so that the proper voltage was delivered to the correct wire for FNR. I have the push button in nuetral when I'm cranking it over. But, I have the throttle at the point where it says "start" on the control box panel, which is actually a fully closed throttle.
Could that be my problem? I'm probably going to at least try advancing the throttle some today, and see what happens.
If anyone has any suggestions , then I would love to hear them. I ran into a guy who's a marine mechanic, and all he said was to throw the motor off the back of the boat (Thanks a lot buddy!:facepalm:...It's still on the trailer anyway).
What would you guys suggest I do next?...besides the white anchor suggestion...LOL.
I'm confused but I'll keep you all updated.
Thanks Everyone! It'll fire up one of these days!
Here's an update/new problem with my '72 Johnson 85hp.
I think I have some kind of fuel delivery problem. I can't get it to fire up yet.
I cleaned every orifice in my carbs, inspected the float needle and seat, set the float level, then reinstalled them. When I had them off I peered in the motor with a flashlight, and my reed-valves looked fine (no problems that I could see). Could it be that they are not allowing fuel to reach the cylinders?
When I squeezed the primer bulb, premix flowed freely up into the float bowls (I checked to make sure). I had the vent open on the fuel tank. I choked it , and cranked it over a few times. I didn't even get a pop.
I pulled one of the plugs to see if there was fuel in the cylinder and I didn't smell much of anything. I checked the rest of the plugs, and one of them smelled faintly of gas, and a thin wisp of vapor came out of the cylinder, but not much. All lines are reconnected.
Here's what I'm thinkin'. Maybe I don't have the carbs adjusted properly. These carbs don't have low speed needles. There are two plug screws in the front of each carb. I checked the exploded parts diagram to make sure that was correct for the year. when I took the carbs apart the plugs were tight. I have no idea if the last guy who had the motor had them set correctly. I tried backing them our a full turn and trying again, but still nothing. So, how is it that the air fuel mixture would flow properly to the cylinder. The plugs being tight makes me think that there wouldn't be much of a draw.
My other thought is that I need to have the throttle opened more. The controls are from an Evinrude that had to be rewired so that the proper voltage was delivered to the correct wire for FNR. I have the push button in nuetral when I'm cranking it over. But, I have the throttle at the point where it says "start" on the control box panel, which is actually a fully closed throttle.
Could that be my problem? I'm probably going to at least try advancing the throttle some today, and see what happens.
If anyone has any suggestions , then I would love to hear them. I ran into a guy who's a marine mechanic, and all he said was to throw the motor off the back of the boat (Thanks a lot buddy!:facepalm:...It's still on the trailer anyway).
What would you guys suggest I do next?...besides the white anchor suggestion...LOL.
I'm confused but I'll keep you all updated.
Thanks Everyone! It'll fire up one of these days!
