Starting issue "possbily" solved

[WhiteRice]

I hate starting a new thread but I may have landed on something:

'97 Evinrude 25HP 3cyl with rope start.

I was having issues getting the motor to turn over after rebuilding the carbs (the right way finally), inspecting all spark and ignition components and checking fuel supply. I probably should've done this a while back but I sprayed a little carb cleaner into the carb throats and wouldn't you know it... It started right up. Didn't even hesitate a bit.

So through lot's of reading I am concluding that this motor either needs a primer system installed (still trying to find how to do that) or I have a clogged idle jet in my carb. When rebuilding the carbs I used a new rebuild kit, soaked the carbs after removing all plastic and ran a fine copper wire through the orifices and then blew out with compressed air. So, either I missed a jet, a jet is still clogging somehow or I need to install a primer system.

Thoughts?

 

[racerone]

I believe I mentioned a primer a long , long time ago.-----Now finally you want to follow that path on your motor ?---------So do you have a battery in the boat , yes or no ??-----Have you looked at different motors ( 6 / 8 / 20 / 30 hp ) of the same vintage that do use a manual primer , yes or no ??----Is there a fitting on your motor intake manifold for the primer hose like electric start models , yes or no ??----Some more searching in the proper place required , or bring it over and I fiks for you !

 

[Vic.S]

I hate starting a new thread but I may have landed on something:

'97 Evinrude 25HP 3cyl with rope start.

I was having issues getting the motor to turn over after rebuilding the carbs (the right way finally), inspecting all spark and ignition components and checking fuel supply. I probably should've done this a while back but I sprayed a little carb cleaner into the carb throats and wouldn't you know it... It started right up. Didn't even hesitate a bit.

So through lot's of reading I am concluding that this motor either needs a primer system installed (still trying to find how to do that) or I have a clogged idle jet in my carb. When rebuilding the carbs I used a new rebuild kit, soaked the carbs after removing all plastic and ran a fine copper wire through the orifices and then blew out with compressed air. So, either I missed a jet, a jet is still clogging somehow or I need to install a primer system.

Thoughts?

You need to state the model number!

 

[WhiteRice]

Model is E25RMEUR

I have 2 batteries in the boat. 1 up front for the trolling motor and another in the console for the electronics / lights.

I have looked at the schematics for the 35HP (several part are similar with 25 hp) but they do not show a manual primer that I can distinguish. I am attaching 2 pics of my carbs and manifold and I believe the fitting you are referring to is the capped one at the top behind carb #1 but I am not certain.

 

[racerone]

Yes the 35 hp is essentially the same motor except it has bigger bore / displacement !!-----And that is why I mentioned looking at primers on the 6 / 8 / 20 / 30 hp motors because I know that the manual primer is not available / listed on 9.9 / 15 / 3 cylinder 25 and 35 hp models.----So do you have any source of used parts in your area ?---Do you want to go with the 12 volt primer as found on the electric start models, yes or no ?----Sorry I do not know what is in your workshop or how YOU want to do this !

 

[WhiteRice]

I'd be willing to install anything at this point. Not sure about used parts in my area but if I need to buy a new primer unit and install it... I'm fine with that. I'm just needing some direction in which one to get and if there is any tutorial anywhere on installing it. I am mechanically sound with vehicles but I am still learning outboards. I enjoy troubleshooting and working through things myself so I can tackle them in the future. I just want to get to the conclusion of this thing

 

[racerone]

The manual primer is a hand operated PUMP and it pulls fuel from one carburetor bowl and injects it into that fitting.-----The electric primer is NOT A PUMP it is a valve that opens with 12 volts applied or emergency red lever to open it.-----It is plumbed into the fuel supply between the 2 fuel pumps and carburetors.-----It needs fuel to it under pressure in order to inject fuel to that fitting.-----I hope that is enuff info for you to install the one of your choice.----Or bring it over I fiks for you !

 

[WhiteRice]

If I go the manual pump route, does it connect to the capped fitting you can see at the top of the manifold in the 1st pic? Just want to make sure that is not a capped recirculation line for oil.

 

[racerone]

???----And why would they cap a recirculation line for oil ?-----Let me look at one of about 10 of these motors.----I will post if it is different !

 

[Crosbyman]

The primer solution may work but the fundamental question to ask is .... Are all 97 25 hp like yours having the same problem or is it just yours ?

...I presume the answer is NO

Why not find the problem instead of working around it .??

if they are all like yours then go ahead .

 

[WhiteRice]

Because at the bottom of the manifold there is an almost identical 1/8" fitting that goes back to the recirc lines behind the powerpack.

I have found a few "Plunger" type fuel primers that look like they would work. They all include 1/8" hose and one "T" connector so can I assume I would run the 1/8" fuel line from this primer to the top 1/8" fitting at the top of my manifold? I'm just not sure if all three carbs must be primed or if one would suffice to start the motor. If you look at the manifold in the picture, #1 is a 1/8" fitting is capped, #2 is a capped schrader valve and #3 is going to my recirc lines.

 

[WhiteRice]

The primer solution may work but the fundamental question to ask is .... Are all 97 25 hp like yours having the same problem or is it just yours ?

...I presume the answer is NO

Why not find the problem instead of working around it .??

if they are all like yours then go ahead .

And what "problem" would you assume there is beyond cold start issues with a non-primed motor? There are several threads about OMC products being tough with cold-starting and most require priming of some sort. And how is this "working around the problem" when if you read the original post you would see that other means of correcting this have not resulted in a solution?

 

[Crosbyman]

The question stands but if as you indicate the issue is the same or common on these engines then go ahead .

 

[WhiteRice]

The question stands but if as you indicate the issue is the same or common on these engines then go ahead .

Your question may still stand but are you not able to give any insight into "find the problem" beyond what I have done already? If not, I feel it is rather presumptuous to state that I am simply working around a problem when in fact I am actually narrowing by applied effort.

 

[WhiteRice]

Racerone... If you have one of these motors with a manual primer installed, would you be able to take a picture of it? Want to make sure I route the lines correctly.

 

[racerone]

Explain to me how you think the manual primer works and how it would be installed.-Explain how you think the electric primer works and would be installed.---Read post # 7 a few times and do not overthink this.----Or send the motor and some coins ,then I fiks for you.

 

[WhiteRice]

Then could you dive into your response from post #7 and explain what you mean by "That Fitting"? I stated that there are three fittings on the manifold and I simply asked which one the manual primer would go to. "That Fitting" is about as clear as mud.


You know... You seem like an individual with a TON of knowledge on these motors and I can appreciate that. I have also applied quite a but of the advice you've passed along and I can appreciate that as well. I do not however appreciate the online "scolding" when I am asking for help from YOUR responses (which are mostly questions asking what I know) to my original post. Unfortunately I don't think it a profitable venture for me to send you a motor from South Texas to Canada when you obviously have a problem with someone asking a question for clarification. So I may be burning a bridge here but apparently you need to get back to yelling at kids who may be on your lawn.

 

[Fed]

Why don't you use the choke?

 

[WhiteRice]

The choke on this motor is a VERY basic, manual choke and really has only helped slightly with starting. Ive tried the full choke and 75% high idle procedure for cold starts and it has been hit and miss with that

 

[Fed]

Make sure the choke plates are synchronized and ALL fully closed together.