'62 Johnson 5.5hp Difficult Cold Starting

[OptsyEagle]

The manifold incorporates the sediment bowl into it, and with the manifold off, I noticed the "in" and "out" markings underneath the fuel line connections. These are really difficult to see with the manifold mounted on the motor. Well, anyway, the lines were connected backwards.

Is this a fuel hose you reversed and was it inside the intake manifold or somewhere on the carb. A little confused here.

 

[lindy46]

I let her sit outside all night and it got pretty cool last night, so I'll give her a try shortly. I did let her run for awhile yesterday and I think that helps. She definitely runs smoother now than she did originally. If she still starts hard, next step is to pull the powerhead. You can't remove the exhaust cover without removing the powerhead, as you can't get to the two bottom screws.

 

[oldboat1]

Now that it's off the clock, maybe will want to pull the powerhead and drop the leg anyway and check for blockages up and around, maybe while doing an impeller. Can flush it all out that way too. Otherwise, a believer in just running them -- like I should have been doing with mine this summer.

[been assuming the filter and bowl just incidentally bolts up to the intake cover housing on that one -- Optsy's question -- then fuel line out to the fuel pump on the other side, and on to carb (intake and outlet at the filter had been reversed). Some additional fuel lines and connections to check. Also got to think flow would have been restricted some if lines reversed at the filter, but maybe not.]

 

[lindy46]

Went out this morning and she started on the first pull!! Yay!!

 

[oldboat1]

sounds like success! :happy:

 

[lindy46]

[been assuming the filter and bowl just incidentally bolts up to the intake cover housing on that one -- Optsy's question -- then fuel line out to the fuel pump on the other side, and on to carb (intake and outlet at the filter had been reversed). Some additional fuel lines and connections to check. Also got to think flow would have been restricted some if lines reversed at the filter, but maybe not.]

The fuel from the tank goes first to the fuel pump, then on to the sediment bowl, then to the carb. I think that's right?? (That's how the service manual says it should be). Comments?

 

[oldboat1]

yeah, seems right -- whatever the manual shows. would make sense too, I guess (pump would have easiest/most direct access to fuel source). Only sediment bowl assemblies I have to check are with the two line variety, with pressure tank.

Would want to leave it as OMC intended, but seems offhand like an inline filter between the tank and the fitting or between the pump and the carb would have been simpler and more direct. Probably makes no difference as long as everything is clean and open. All interesting.

edit. Maybe the old fuel bowl assemblies are actually better for removing sediment -- maybe also acts as a water separating filter, unlike inline filters. Don't remember the history behind those, if I ever knew it.

 

[HighTrim]

The fuel from the tank goes first to the fuel pump, then on to the sediment bowl, then to the carb. I think that's right?? (That's how the service manual says it should be). Comments?

that is correct, but often wondered why. Newer fuel pumps have the filter before the diaphragm. Seems like running the fuel through the filter first would ensure longer pump life. Perhaps they did not want it to last longer! No idea.