1977 Chrysler force 75hp will not start

[nersmeister]

Hi,<br />I just got a 1977 Chrysler force 75hp outboard. The engine was running just fine till a weak a go. As I switched gas tanks the engine stopped working and now will not start. The engine will turn but I believe there is no sparks… I unscrewed the spark plug and tested it close to the engine block but there is nothing…<br />Can anyone help please?<br />

 

[eric1]

Re: 1977 Chrysler force 75hp will not start

Welcome to iboats,<br />nermeister, please include all specific info about your outboard and as detailed description of what you did when it quit running.<br /><br />As far as testing spark plugs the electrode(little hook lookin' thing at the bottom of the plug) needs to be in physical contact with BARE METAL. There is also a tool you can use called an in line spark plug tester.<br /><br />start there and keep us posted good luck!!!!

 

[eurolarva]

Re: 1977 Chrysler force 75hp will not start

Seems a little strange that switching gas tanks could cause you to loose your spark Try filling old tank with gas and running off that tank again. My guess if you ran old tank dry you picked up some water or other debris in your carb or fuel pump. To verify you have spark use a spray bottle of gas and oil mix and spray a little of this directly into the carburator with choke open. If it fires you got something blocking your carb or fuel pump

 

[nersmeister]

Re: 1977 Chrysler force 75hp will not start

Thank you eric1 & eurolarva, for your input. I will try both methods…<br />As far as specifics to be honest All I know about this engine is what I wrote earlier. 1977 Chrysler Force 75hp. The boat was a hand down so I don’t know much about its past history beside the fact that I was told that it was serviced and most parts were replaced including most electrical components. I only ran the boat once in salt water, and it worked ok. To be more specific I was cleaning the engine by flushing it through with fresh water and as I was told I had to take the gas line out and let it run dry. Once I did this procedure the NEXT time I went to run the motor it would not run… so I do believe that you both are on the right track…. I would appreciate more input if any… and I will work on the boat today to see if I can solve the problem…<br />Thanks again for your time and sharing of knowledge….<br />

 

[eric1]

Re: 1977 Chrysler force 75hp will not start

As far as specifics go for your motor you can start by locating the manufactures id plate , It should be either on the transom mounting bracket or like mine ; In the engine compartment(under engine cowling). The will be a serial number and that will allow you to research your specific engine.<br />This web site will help.<br /><br /> http://www.marineparts.com/partspages/techhelp/tech5.htm <br /><br />As far as testing goes I would start by checking all my spark plugs. Clean them if nesscary. Check gap on all of them. Then I would try the alternate fuel test that eurolarva suggested.As far as running the fuel out of the carbs goes read the thread listed below.<br /><br /> http://www.iboats.com/cgi-bin/ubb/ultimatebb.cgi?ubb=get_topic;f=17;t=036314#000000 <br /><br />Good luck.

 

[Terry H]

Re: 1977 Chrysler force 75hp will not start

Don't run the carbs dry thatta way...will only do more harm than good. I would be cleaning the filter on the fuel pump. Likely junk from one of the tanks plugged it...I would also go to auto parts and get a clear plastic filter and mount it under the hood, that way you will have that scum filtered out before it gets anywhere harmful. They're cheap so get a couple ofem...just a Thought

 

[nersmeister]

Re: 1977 Chrysler force 75hp will not start

Well, I got a inline sparkplug tester and found out that the engine is not getting any power…. I traced it back but I couldn’t pass the distributor… every thing looks New and OK with the distributor… it is almost new… so I don’t understand what causing it not to function. I suspect that maybe the alternator belt has slipped and now the timing sequence may be off. But I would assume that the plugs would get electric current…and that I should be able to see that with the inline tester???? I don’t know how to test the alternator or distributor, to se if it is good or that the problem may be from somewhere else…I am also wandering if it could be a kill switch problem or a inline fuse… I traced everything but I can’t find a thing… all fuses look ok …. ????? I am stock again. I did clean the fuel filter and carburetor…. I don’t thing the problem is from them…I think is electric...<br /> <br />Thank you all…<br />

 

[eurolarva]

Re: 1977 Chrysler force 75hp will not start

did you remove spark plug from cylinder, reconnect it to boot, put the threads against the metal on the motor and then crank. I use a wire wrapped around the threads and tied to a screw mounted on the motor. Check for spark in dark area like garage. Do you have a kill switch or wrist strap near the controls? Still seems stange to me you would loose spark while changing gas cans.

 

[nersmeister]

Re: 1977 Chrysler force 75hp will not start

Yes, I did both methods, I also used and inline sparkplug tester and there was no spark. I used the tester on my car and it worked properly, then I used it on all the boats sparkplugs and there is no electricity getting to the sparks…all 3 of them???? I looked for the kill switch and there is non, at least not the wrist band type…???<br />I know this starting to suck…<br />Thanks for all your input… I am still trying…<br />

 

[blueskiiies]

Re: 1977 Chrysler force 75hp will not start

Make sure you have voltage going to ignition system. With key on, you should have 12 volts going to the blue terminal on the block. To test, connect a test light between ground (metal on the engine block) and probe the blue terminal. Light will glow if there is voltage is there. If no voltage, problem is between there and the ignition switch. Also probe the boths side of the circut breaker and the red terminal on the block. They all should have voltage.

 

[der]

Re: 1977 Chrysler force 75hp will not start

Just a taught but I had same problems with my motor, it turned out to be a faulty ignition switch. The off position on my switch had an earth position to kill the engine (spark), which was faulty. The engine would turn over but no spark. I only found the problem when I disconnected the ignition and shorted the starter.

 

[nersmeister]

Re: 1977 Chrysler force 75hp will not start

thanks guys, I will try the ingnition this week and get back... sounds promising

 

[nersmeister]

Re: 1977 Chrysler force 75hp will not start

Der,<br />Where did you get a new ignition switch for this boat???

 

[nersmeister]

Re: 1977 Chrysler force 75hp will not start

Well turns out that the entire ignition system is out. I did get an ignition switch but that was not the problem…so I need to find a 1977 Chrysler 75Hp ignitions system for this boat. The mechanic I took it wanted $500 +300 labor to do the job and yet not guarantee me it the engine will work??? Something smells bad around here… <br />thanks you all for the feedback

 

[Terry H]

Re: 1977 Chrysler force 75hp will not start

that sounds fishy...their ain't 300 bucks worth of labor in changing out the whole system. Alls you have is cd unit, coil, and distributor. My guess is that either the cd unit went or the points or trigger inside the distributor is out of adjustment or faulty. That would be my guess as long as you have it all hooked up properly. I also don't think that the whole system would cost 500 bucks. I do know where you can find a used ignition system for your motor, but you aren't gonna need it all...just a Thought

 

[scotiany]

Re: 1977 Chrysler force 75hp will not start

I got a brand new old stock Chrysler ignition switch on ebay last year for $25. There is a place called Boat n RV Warehouse around Albany,NY that sells them too.

 

[fixin]

Re: 1977 Chrysler force 75hp will not start

If I were you ,I would get a good manual,half the fun is working on it yourself thats a crazzzzy amount to pay for working on these motors good luck

 

[jd7300]

Re: 1977 Chrysler force 75hp will not start

Hi there,

I have just had a quick read of the problem you are having (please accept my apologies if I am missing the point, I have kids running around and I cant think straight!!).

I have the same motor as you and I experianced very similar problems. It turned out to be a problem with the points in the distributor. The point were all ok and quite new but when I tested them with a multimeter there was no current running through them. I took the dizzy off and cleaned the points up with some wire wool and everything is ok now.

At a glance you would not have been able to see the problem - it may be worth a quick check.

Cheers.