55 hp flooding question

[Frank Acampora]

Re: 55 hp flooding question

You have a old design engine. Probably earlier than 1971 no matter what you were told, because by the 1970s I believe they all had recirculation systems.

NO MATTER: You do NOT have an oil recirculation system. You have two cylinder drains and a manifold drain that combine into one hose below the carb. I can see these hoses the third photo. These hoses have one way valves inside them. Excess raw fuel and oil are simply dumped into the leg and then work out into the water. If you want to stop it, remove the drain hose and either attach it to a suitable container OR re-route it back into the manifold just behind the carb.

I think it was Wickware who added a catch container to his 35-- I know someone here on the forum did it.

 

[jmk]

Re: 55 hp flooding question

Ok I haven't taken it apart yet. I will reroute that hose to a small gas can and see how that works. I was wondering if that was a dump hose. that's why I took that picture more directly at those. I forgot to ask about them I am glad you saw that picture.

 

[jmk]

Re: 55 hp flooding question

Its going to be a couple weeks before I can get the boat back in the water. I have to work weekends and play catch up on chores after work during the week. I will post back to let you know what how I am doing with it for those who are interested. Sorry for the delay, John. Thanks to all for the big help. I really appreciate it.

 

[wickware]

Re: 55 hp flooding question

It was not Wickware who added a catch container to his 35. I searched a little and saw a little info but not direct. Adding a catch container sounds like it would be fairly easy (since the plumbing is basically there) depending on the room for the container.

What would be the effects of recycling into the manifold? The oil and fuel that goes into some small lakes are really contaminating them. Please give a closer Pic or link to a pic when you have time. I doubt my 1970 35 hp Chrysler has any thing close to this. I'm not flooding but I?m polluting as I guess all 2-cycles are. I would be interested to see what I could add to the 35hp.

 

[jmk]

Re: 55 hp flooding question

This was a big success! I just bought four foot of hose and plugged it into the other end of the tee. From there I just hooked it to an empty oil bottle. I got a transparent hose so I can see the fuel pushing. I ran one hose in and a hole for a breather. I wired the quart container to back of the boat in the splash well just for the test run. I will make a more permanent fixture for this latter so I can remove and install easier. I had about a cup of fuel in the container when done boating. The ramp was busy and I had to wait to get off the lake shifting from forward to reverse for about fifteen minutes. People can be idiots at ramps! Anyway, it was nice to sit there with clean water around me. It loads the bottle in low rpms. Higher rpms it doesn't seem to move much in the hose. My idle seems to have gone down a tad to almost stall. I will adjust that up a tad. Not sure if its just the motor or what I have done. Ensign look at the third photo of the hoses earlier posted. I will post more when I have time. with pics

 

[Frank Acampora]

Re: 55 hp flooding question

WICKWARE: At idle, fuel and oil tends to condense and settle out in the crankcase (right in the bypass passages). It builds up to a point where a slug of this mix will blow into the cylinder, causing a misfire. Recirculation systems drain the bottom of the bypass passages and remove this mix BEFORE it becomes too much. On the Chrysler/Force engines they inject it directly into the cylinder(s) through a fitting on the bypass cover(s). This keeps the engine from stuttering at idle.

At higher RPM. there is so much airflow through the engine that fuel and oil does not have as great a chance to puddle out. Any puddling that does happen is blown into the cylinder before it becomes great enough to be troublesome. That is why JMK doesn't see as much at high RPM.

Taking puddled fuel/oil mix and injecting it back into the manifold will simply mix it with fresh charge, diluting it and also prevent idling problems. I do it on almost all my 4 cylinder engines and the three cylinder engines come stock like that. LATE model Force engines did change the system and I have not studied it in depth but in some models it is directed to crankshaft bearings

 

[wickware]

Re: 55 hp flooding question

Thanks Frank! If my 1970 35 hp Chrysler is not showing a flooding or build-up issue, it should be OK as is, ?Correct??