73' Chrysler 55hp after getting hot Stalls at low speeds and is hard to start.

[gotmach]

My 55hp Chrysler strats up great cold. Runs strong and has a lot of power. However when slowing down after running full throttle it stalls and becomes hard to start. First thing I though was the choke was stuck closed. I looked at the choke and it is open when this happens. <br /><br />As for cooling on this motor it has a constant spitty dribble at idle and a good spray at cruise.<br /><br />Any ideas or suggestions?

 

[scotiany]

Re: 73' Chrysler 55hp after getting hot Stalls at low speeds and is hard to star

Re: 73' Chrysler 55hp after getting hot Stalls at low speeds and is hard to star

I'm suprised it has a good spray at cruise. Most exhaust goes out the motor leg underwater at cruise. Said this a few times before. Check to see if the puddle valve is plugged up. That will cause you to run only on the upper cylinder at low speed because the bottom one is overloaded with too much fuel.

 

[eurolarva]

Re: 73' Chrysler 55hp after getting hot Stalls at low speeds and is hard to star

Re: 73' Chrysler 55hp after getting hot Stalls at low speeds and is hard to star

When you start up the motor does it idle high? I mean high enough where it grinds getting it into forward or reverse?

 

[harkawy]

Re: 73' Chrysler 55hp after getting hot Stalls at low speeds and is hard to star

Re: 73' Chrysler 55hp after getting hot Stalls at low speeds and is hard to star

I spent over $600 trying to find out why my Force 70 died at idle speed in the early afternoon. Three trips to the lake and still the darn thing would stall after about 5 to 10 minutes in a no wake zone. Had to be towed to the dock more than once. Turns out the hand pump bulb or hose close to it had a very small pin hole permitting gas to siphen back into the tank. The gas in the carb and fuel line was enough to start the engine and run for 5 or ten minutes and then would die. I couldn't get it started again. I had the feeder line, bulb and supply line replaced. Problem went away.

 

[gotmach]

Re: 73' Chrysler 55hp after getting hot Stalls at low speeds and is hard to star

Re: 73' Chrysler 55hp after getting hot Stalls at low speeds and is hard to star

scotiany - I have no idea where the puddle valve is but I guess I need to buy a manual for the motor. Is it hard to check?<br /><br />eurolarva - The motor seems to idle fine and shifts nice into gear.<br /><br />harkaway - see info below <br /><br />Here is more info on what happend and the problem I'm having:<br /><br />Went out Sat motor started up nice, shifted nice, putted out of the marina nice, and got up to full throttle nice. I drove about 1 mile out of the marina when I decided to slow down and look at the fish finder. As soon as I slowed down the motor bogged a little and stalled. Then it would not restart. I tried off and on for a couple hours and could not get it started. I did take the cover off and looked and saw fuel in the glass bowl. I also squeezed the fule bulb and it was still tight. I did noticed when I squeezed it hard it leaked a little where it connects to the engine. I need to put a better hose clamp on it. Anyways I ended up running the battery down and had to get towed back. When I got it home I took the cover of and started inspecting it. One thing that looked odd to me was the cam and roller that opened the butterfly in the carb. There was a small gap between the roller and the cam which got me thinking what would happend if I adjusted it so the cam and roller touched and the butterfly was open just a sliver. I hooked up the garden hose had the butterfly open a sliver and the motor fired right up. I tried this several times and it kept starting up easily. I decided to test the motor so I took it to a local river started nice....putted away from the dock nice.....got up to full throttle nice. However again when it got hot and I slowed down the motor stalled. This time however after a few trys I could get it running again but was extrememly hard to start. Once started though it would run great at cruise speed but when I slow it stalls and is hard to start. Hard to start is better than dead in the water but something is still not right.<br /><br />I do appreciate all the comments and advice and welcome the continued opinions.<br /><br />p.s. This motor when running runs and sounds excellent. There are no misses and it responds nice to the throttle. I am impressed with the power it is putting out. I just bought it and put it on my boat but am really impressed with it. Only issue I have is what I'm posting about.

 

[TazMan1]

Re: 73' Chrysler 55hp after getting hot Stalls at low speeds and is hard to star

Re: 73' Chrysler 55hp after getting hot Stalls at low speeds and is hard to star

I'm having the same problem with my '73, 45 hp. It fires right up when its cold but once running it gets hot and when you shut it off its very hard to start, usually have to let it sit before it will start again. Any ideas or suggestions would be greatly appriciated. I read about the puddle value. What is that exactly and where is it located?

 

[scotiany]

Re: 73' Chrysler 55hp after getting hot Stalls at low speeds and is hard to star

Re: 73' Chrysler 55hp after getting hot Stalls at low speeds and is hard to star

The more I read, I don't think the puddle valve is your problem. But, it's located behind your throttle towershaft. You' see 2 screws and 2 bolts. If you take it off, be very careful of the gaskets. They're very hard to find.

 

[gotmach]

Re: 73' Chrysler 55hp after getting hot Stalls at low speeds and is hard to star

Re: 73' Chrysler 55hp after getting hot Stalls at low speeds and is hard to star

I'm going to go ahead and put a fuel pump kit in it seeings how they are cheap. Where is the best place online to buy on for a old chrysler?

 

[eurolarva]

Re: 73' Chrysler 55hp after getting hot Stalls at low speeds and is hard to star

Re: 73' Chrysler 55hp after getting hot Stalls at low speeds and is hard to star

NAPA sells the kit 18-7806 is the part number.

 

[gotmach]

Re: 73' Chrysler 55hp after getting hot Stalls at low speeds and is hard to star

Re: 73' Chrysler 55hp after getting hot Stalls at low speeds and is hard to star

eurolarva thanks.<br /><br />I'm going to give the fuel pump kit a try to fix this problem. Is there any other thing you can think of that could cause this problem of becomming hard to start after getting hot?

 

[BF]

Re: 73' Chrysler 55hp after getting hot Stalls at low speeds and is hard to star

Re: 73' Chrysler 55hp after getting hot Stalls at low speeds and is hard to star

Maybe electrical? Maybe check the spark when it's hot and acting up. Could be a coil that starts failing when it gets warm, or even a bad plug. If a cylinder has a weak spark when hot, then swap the plugs and see if it follows the plug. Then you could swap the coils and see if it follows the coil.<br /><br />That's my $.02. <br /><br />Good luck.

 

[gotmach]

Re: 73' Chrysler 55hp after getting hot Stalls at low speeds and is hard to star

Re: 73' Chrysler 55hp after getting hot Stalls at low speeds and is hard to star

Could be BF. I should have checked the spark last time I was out. After I get the fuel pump kit installed(this weekend) I'll take it out again for another test run. If the problem continues I'll make sure I pull the plugs one at a time and check to make sure they both have good spark. I think I will also check the spark cold before I go out so I can tell if there is a noticible drop. Either way I will post back here seeings how Tazman1 and Kalian are having similar problems.

 

[gotmach]

Re: 73' Chrysler 55hp after getting hot Stalls at low speeds and is hard to star

Re: 73' Chrysler 55hp after getting hot Stalls at low speeds and is hard to star

Fuel pump kit was not my fix.<br /><br />I got the fuel pump kit today installed it. In addition to the fuel pump kit I went ahead and replaced all the fuel lines on the motor, many looked old. I also changed my plugs. The old plugs looked good and didnt really need replaced but got replaced anyways. Thier color was good. I Checked cold spark and the spark looks good. I then took the boat out for about 1 hour. I warmed it up and still it would stall when slowing down. I did not get it hot engough to see if it would go into the no start mode. I was however able to get it to idle a little better by adjusting the mixture screw in 1/4 turn. It then got dark so I had to quit for the day. I'll try to get it back out and do some more trouble shooting tomorrow if the weather lets me. I'll post back.

 

[gotmach]

Re: 73' Chrysler 55hp after getting hot Stalls at low speeds and is hard to star

Re: 73' Chrysler 55hp after getting hot Stalls at low speeds and is hard to star

Took it out Saturday for a longer ride. After getting it hot it started loosing power rapidly then it died. I then decided to check the spark again after it died and found 1 cylinder lost spark which is telling me it is probabbly a coil going bad(correct me if I'm wrong). At least I know now it is a ignition problem vs a fuel problem.

 

[BF]

Re: 73' Chrysler 55hp after getting hot Stalls at low speeds and is hard to star

Re: 73' Chrysler 55hp after getting hot Stalls at low speeds and is hard to star

sounds like your onto it now. If it were me, I'd replace all the ignition parts with new (both sets of points, coils, condensers)... but you could probably troubleshoot it down to one bad part. If you're so inclined. For me, I'd rather know that the whole new ignition system should be trouble free for some years to come.<br /><br />I've never pulled the flywheel on my chrysler, so I don't know if there are any tricks, or whether a harmonic balancer puller works OK (that's what I use for small OMC's)<br /><br />Good luck, and keep posting updates.

 

[gotmach]

Re: 73' Chrysler 55hp after getting hot Stalls at low speeds and is hard to star

Re: 73' Chrysler 55hp after getting hot Stalls at low speeds and is hard to star

Yep my plan now is to replace both sets of points, coils, and condensers. While I have my flywheel off is there anything else I should be looking at?<br /><br />Also I too have never done this before and would appreciate any tips or tricks.<br /><br />I did pick up a Clymer manual from the Library.

 

[BF]

Re: 73' Chrysler 55hp after getting hot Stalls at low speeds and is hard to star

Re: 73' Chrysler 55hp after getting hot Stalls at low speeds and is hard to star

One tip, make sure the coil wires are right down and out of the way and won't rub on the crank or the flywheel. When I did coils on my 25 'rude, it started missing after about 5 minutes of running. That's how long it took the flywheel to rub the insulation off 1 coil wire that wasn't tucked down enough. A dab of liquid electrical tape (and moving the wire) made it good. Live and learn.

 

[bnk999]

Re: 73' Chrysler 55hp after getting hot Stalls at low speeds and is hard to star

Re: 73' Chrysler 55hp after getting hot Stalls at low speeds and is hard to star

When I pulled my flywheel off I used an impact wrench/air compressor, and the nut came right off-- then used a puller and hit it a couple of times with a rubber mallet and voila off it came