35 chrysler -model 355BA - cannot reach high speed when prop engaged?

[danmac999]

Hi ,I am new to boating and outboard motors . I have a 35 Chrysler outboard on a 14 ft fiberglass vangaurd.
The engine runs great and can reach very high rpms when it is in the disengaged prop setting. The Problem I am having is when I Engaged the prop it does not reach High Speed ? It only goes like 5-10 MPH? It seem's like it is in a low speed setting? There is a button and linkage missing on the throttle console . Is there a low - High setting that need to be engaged? can this be done maually on the engine or is this somthing else?



please help! I am not having much fun putt putting at low speed?

Thanks

 

[jerryjerry05]

Re: 35 chrysler -model 355BA - cannot reach high speed when prop engaged?

First do a compression/spark test.
Motors always rev up with no load.
Plugs burning right?
The shifter looks like that hole is for an ignition(I think).
Then check the fuel pump diaphram.
Force Forum.Top post is a link from FrankA called a linc and sinc.
Do that after the other tests.

 

[wickware]

Re: 35 chrysler -model 355BA - cannot reach high speed when prop engaged?

Are you getting a full range of travel at your engine?s throttle (with the engine in gear) from your control box? It sounds as if you are in neutral since you can get the higher RPM before putting it into gear. Please give some history as to when this started and what you feel might have caused it. If the boat is new to you and came with the problem, have you gotten any history from the previous owner?

Attached is how my throttle and towers on my 1970 35 HP Chrysler appears. You might look for conflicts in the towers and cabling that?s not allowing a full throttle while in gear. My control box is different from yours but I?m sure there are some relations to throttling.

Good Luck!

 

[danmac999]

Re: 35 chrysler -model 355BA - cannot reach high speed when prop engaged?

First do a compression/spark test.
Motors always rev up with no load.
Plugs burning right?
The shifter looks like that hole is for an ignition(I think).
Then check the fuel pump diaphram.
Force Forum.Top post is a link from FrankA called a linc and sinc.
Do that after the other tests.

Hi Jerry , I have found out that one spark plug is not firing . I took off the flywheel and saw that one ground wire was off the coil and the coil rock or whatever it is that it is monted to has a crack in it . I reconnected the wires but there is still no spark. I am assuming this coil need to be replaced. Chyrsler no longer makes a replacment for this part # F12057 and there are very few even in existance that i can locate. Is there a way to modify to a new coil that will fit the strator plate to generate a spark on this old engine?

any help is greatly appeciated

 

[danmac999]

Re: 35 chrysler -model 355BA - cannot reach high speed when prop engaged?

Are you getting a full range of travel at your engine?s throttle (with the engine in gear) from your control box? It sounds as if you are in neutral since you can get the higher RPM before putting it into gear. Please give some history as to when this started and what you feel might have caused it. If the boat is new to you and came with the problem, have you gotten any history from the previous owner?

Attached is how my throttle and towers on my 1970 35 HP Chrysler appears. You might look for conflicts in the towers and cabling that?s not allowing a full throttle while in gear. My control box is different from yours but I?m sure there are some relations to throttling.

Good Luck![/Quote}

Thanks Wick, your engine is identical to mine .. I found that one spark plug is not firing looks like the coil need to be replaced but cannot find a new one. any Ideas?

 

[wickware]

Re: 35 chrysler -model 355BA - cannot reach high speed when prop engaged?

1. Switch the coils to see if the fire switches.
2. It could be a bad condenser or dirty contact points vs a coil.
3. Plus, I feel coils are out there from other mag systems.
4. There are also the electronics kits that I have only used on mowers but the same technology.
5. Do you have a good close pic of you mag?s contacts (as attached)?
6. Have you used an ohmmeter to know your contacts are making good contact vs being contaminated?
7. I am using my original parts since my 1984 purchase that has only needed cleaning which has impressed me.

 

[danmac999]

Re: 35 chrysler -model 355BA - cannot reach high speed when prop engaged?

1. Switch the coils to see if the fire switches.
2. It could be a bad condenser or dirty contact points vs a coil.
3. Plus, I feel coils are out there from other mag systems.
4. There are also the electronics kits that I have only used on mowers but the same technology.
5. Do you have a good close pic of you mag’s contacts (as attached)?
6. Have you used an ohmmeter to know your contacts are making good contact vs being contaminated?
7. I am using my original parts since my 1984 purchase that has only needed cleaning which has impressed me.

the part that is cracked is on the orange piece. Maybe it will still work? I am not sure if the contact points are on the outside where the crack is or in the the inside diameter by the shaft near the brass fittings? what is the best way to clean this ?

 

[jerryjerry05]

Re: 35 chrysler -model 355BA - cannot reach high speed when prop engaged?

Pic#2 it's the points you have to use sand paper on them.
The crack might not mean anything.
Clean up both sets of points.Put some silicone in the crack.
Then see if the cylinder fires.
Still no spark.Swap coils around.
Then it should have no spark if the points are bad.
Just trying to follow the bad.

 

[wickware]

Re: 35 chrysler -model 355BA - cannot reach high speed when prop engaged?

1. The mag sys looks good and bad. Looks as if the area is dirty which could contaminate the contact points.
2. Put that ohmmeter to work to know the points are making contact and opening .020 at the highest point and clean.
3. I would suggest not trying to time the engine unless you know it's off and have experience setting the timing. My prob has always been dirty points vs burned or timing.
4. I see a little coil damage that could have come from running screws too deep in the flywheel pulling it.
5. My dirty mag and contaminated points started from me using too much oil in the wics to oil the cam lobs (2-3 drop will do).
6. I feel you will have 2 good blue sparks soon, at about 30 MPH and will be ready for the next challenge.
7. Do you have a good ref Manual as a Clymer to help on the maintenance matters?

 

[danmac999]

Re: 35 chrysler -model 355BA - cannot reach high speed when prop engaged?

today I have switched the condesers from the bad plug to the good one . The plug got a spark still so i know it is not the condenser.
I took apart bad spark plug connection and made sure it was a snug fit also. I cleaned the contact points with a a light sand paper and still got nothing from the bad port. Unfortunatly I do not have a ohm reader at this time to test connectivity or locate where short may be?

The only other noticiable difference I can see is that the Black metal peice that stick out of the Orange part on the outside connection is a about 1/8 smaller in depth to the outside diameter from the working side. would this cause some sort of failure ?

thanks for your assitance

 

[wickware]

Re: 35 chrysler -model 355BA - cannot reach high speed when prop engaged?

1. I would switch the coils next to see if you switch sparks. It sounds, as they might be physically different. Which I feel could make a difference if the gap between the coil?s end to flywheel?s magnet is too far apart.
2. I feel we might be looking for an open matter or too much space vs a short.
3. Did the points look good with a .020 gap (a dime?s thickness) at the highest point on the cam lobe, which an arrow indicates?

Hang In There! You will learn some good info. Plus, it sounds as if a coil might have been Changed. Is an ID # on the coils?

 

[danmac999]

Re: 35 chrysler -model 355BA - cannot reach high speed when prop engaged?

Hi , I wanted to get back to you all and let you know the progress that has been made since the original issue and say thank you for all the assitance.!!!

I had have successfully got spark going on the motor by replacing the bad coil and a set of new pick ups !! yayyy. It took me a while to getting it going properly and seting the pick up spacing was a little troublesome but finnally got it set right.

I had trouble with the flywheel right off the batt .. I wore the groove out on the key way from repeatedly taking the fly wheel on and off.
eventualy realized what was happening and and got new keys and putt them in with lapping compound after using all kinds of different applicatinons to have it secured. must have snapped 5 woodruff keys from not tourqing down the fly wheel hard enough !!

now that all is running I had zero cooling from my water intake !! I have taken apart the lower end and discoved the impeller was absoulty shredded and some rubber plug unit from ouside the water pump that connected to the water line from the pump was destroyed and melted. I will be looking for this replacment now.

what a project this has been and I am learning a ton of stuff. I have renamed the engine to "Rick Roll" everytime i get somthing working another thing blows on it.lol

I think I should have it on the water again this week and see how she goes for the high speed test again!!

Thanks all