Tohatsu 25hp cold start problem

[kandil]

Hello I have a 25 HP 2 cylinder 2 stroke Tohatsu that is made between 92 and 94 . I want to ask a couple of question
1-is this year the same as the later models because I have been reading her about changing the manifold gasket and advance the timing and it well be 30hp?
2-This outboard is hard to start cold it takes 3 to 4 pulls but once it start and it warms up it start from 1 pull?
the owner told me that this was normal for Tohatsu but I don't believe him!! he said that the carburetor is very clean but I think that the problem is in it.So what you think? any help is truly appreciate it thank you

 

[TOHATSU GURU]

Re: Tohatsu 25hp cold start problem

1) Yes

2) No, you have to troubleshoot the engine to find out why it doesn't start on the first pull.

 

[kandil]

Re: Tohatsu 25hp cold start problem

where should I start thanks

 

[deejaycee_2000]

Re: Tohatsu 25hp cold start problem

kandil, 3 - 4 pulls is normal for a motor that is cold and have been sitting for a while ...... if it takes 3 - 4 pulls to start when it is all warmed up, then you have a issue, but you say it starts with 1 pull when warm, so it is normal ..........

 

[TOHATSU GURU]

Re: Tohatsu 25hp cold start problem

Actually it's not normal...It's designed to start on the first pull and it will if everything is correct on the engine.

 

[kandil]

Re: Tohatsu 25hp cold start problem

OK commanders don't argue can you tell me where should I start I am thinking a carb kit? Elven can you please explain how to advance the timing I read from your post that it is very easy to do and in some other posts you recommend taking it to the dealer or you blow the motor!!oh and please don't tell me to get a manual!! thanks

 

[TOHATSU GURU]

Re: Tohatsu 25hp cold start problem

As you don't know what is wrong, I wouldn't start throwing parts at it. A manual is required in your case as I don't tell people how to fix their engines...I only point them down the correct path.

 

[kandil]

Re: Tohatsu 25hp cold start problem

Can you please point me down the correct path.what could cause this? is there a cold start sensor? or is it a fuel problem?did any one have this issue befor and how did you fix it? Thank you

 

[TOHATSU GURU]

Re: Tohatsu 25hp cold start problem

The path starts with a service manual. Then you start trouble shooting the engine to determine which of it's systems is not up to specification. Your issue is common to engines that are not well maintained and the solution is always to find the source of the problem and then to fix that problem.

 

[kandil]

Re: Tohatsu 25hp cold start problem

OK I ordered a manual. In the mean time I cleaned the carb and it was kind of dirty and checked the plugs one was almost closed and the other was not the right gab nether cleaned them but that did not fix the problem I noticed some oil and gas mix coming from the gasket at bottom of the motor inside under that hose that goes from the bottom to the top!! I wonder if this is the problem?and as the motor was idling I noticed some oil coming out from the exhaust at the propeller F**k so I shut the motor and it was dripping from under the porpeller what is wrong is this easy to fix what do I need.thanks

 

[TOHATSU GURU]

Re: Tohatsu 25hp cold start problem

On the oil drip...Is it black, gray, or white?

On the hose leak...Fix the leak. If can leak fuel out, it can suck air in.

 

[kandil]

Re: Tohatsu 25hp cold start problem

The oil is black. is the Clymer marine repair manuals any good? and can some one please tell me how many turn do I back the air mixture screw?thanks

 

[TOHATSU GURU]

Re: Tohatsu 25hp cold start problem

The Clymer manual makes a decent door stop. Black oil is probably just unburned fuel/oil from the exhaust and is normal. Start at 1 3/8.

 

[jnewtonsem]

Re: Tohatsu 25hp cold start problem

Kandil:
I have a early 90'S 30HP. Same motor different carb. Mine also starts on 2-3 pulls when cold. BUT if the choke and throttle aren't set just right can be a real ***** to start. Would kick over on 2-3 pulls run a few seconds and then die as I was playing with the choke. After that couldn't find the right setting to get it started. Took me a while to know where to set everything. The first few times I wanted to junk the thing, probably where you are now.

Also if you are running on muffs, there is a water intake on the underside of the cav plate above the prop that you need to tape off, otherwise motor has difficulty getting enough water.

Tahsguru can probably give you more info.

 

[kandil]

Re: Tohatsu 25hp cold start problem

Kandil:
I have a early 90'S 30HP. Same motor different carb. Mine also starts on 2-3 pulls when cold. BUT if the choke and throttle aren't set just right can be a real ***** to start. Would kick over on 2-3 pulls run a few seconds and then die as I was playing with the choke. After that couldn't find the right setting to get it started. Took me a while to know where to set everything. The first few times I wanted to junk the thing, probably where you are now.

Also if you are running on muffs, there is a water intake on the underside of the cav plate above the prop that you need to tape off, otherwise motor has difficulty getting enough water.

Tahsguru can probably give you more info.

Hi jnewtonsem it sound just like mine exactly. I went to the dealer in DC yesterday and it was very disappointing all the parts I need are special order!!! this is bul***t you would think the dealer would have some rubber gasket in stoke!!!not even a manual,carb kit,gear oil only the spark plug.Any way thanks for the advice and I am waiting on Tohatsu Guru to give me the real advice he is holding back.
I also confirmed that the oil leak is gear oil.I ordered all the gasket and seals for the prop from my local dealer I will have to wait.

 

[jnewtonsem]

Re: Tohatsu 25hp cold start problem

Kandil: I think a lot of is just understanding the motor setting after it fires initially. Throttle setting, full, half, or no choke etc. I haven't started mine in a while, but I think I leave throttle setting on start and push the choke about halfway in. You just need to play with it. Get it running, I want to know how that Saturn runs!!!

 

[jnewtonsem]

Re: Tohatsu 25hp cold start problem

Kendil: With mine, I believe it chokes out quickly, so as soon as it fires, I ease off the choke.
Good Luck

 

[kandil]

Re: Tohatsu 25hp cold start problem

I wonder if any one else having the same issue with this 25 and 30HP models?or do we both need to fix something?and that what guru is going to say.
jnewtonsem I love my cat it is fun to ride I have not had a chance to run my saturn with this motor yet I well let you know when the sun shin again in my area the Werther man said sun I hope he is right for a change.I well try to make a short clip and post in my saturn post by next week.

 

[TOHATSU GURU]

Re: Tohatsu 25hp cold start problem

It's a fix it issue. Normal is a one pull start, two pulls is not unusual on some, three pulls is something is out of whack and four or more pulls is something is wrong. "Wrong" can be a variety of things that individually are okay, but in total throw it off. Or you may have a simple problem that you have to find. Finding is the hard part as you either know what and how to find it or you start throwing darts. This is where I repeat "manual" or say something like take to a dealer and have someopne trained to fix, fix it.

 

[kandil]

Re: Tohatsu 25hp cold start problem

Well I think I found it there is fuel mix coming out in between the power head and the drive shaft it is the power head gasket and like you said If can leak fuel out, it can suck air in.I went out today and it started right Way I went for about 10 minute and I stooped for about 30 minute when I tried to start it was hard and it smoked and ran very bad I had to shut it down and I noticed the very Small leak that is under the hose not the hose. so I had to paddle home down stream so the question is about how much to expect to pay at the dealer? or should I try to replace it? I am OK with the mechanical work not bad but if it is complected I would take to the dealer and do I need to get the hole power gasket set or just the large one? I am thinking it is the plastic L at the bottom off the photo how do you take this L out? I well try to replace this first!!thanks