Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 04-09-2008, 09:07   #16
Senior Cruiser
 
sandy daugherty's Avatar

Cruisers Forum Supporter

Join Date: May 2008
Location: near Annapolis
Boat: PDQ 36 & Atlantic 42
Posts: 1,178
Unfortunately, the Tohatsu/Nissan/Mercury/? 3.5 4 stroke has an integral tank and no room under the hood for a water separating filter. The good news is that the translucent tank will reveal water in the low points in a good light. Pull the line from the tank and drain the water. Drop the bowl and spray some carb cleaner into the inlet line and blow it through. Eventually the clot will dissolve around the jet. Then from now on shut the engine down by turning the fuel off, and wait for it to stop.

Cupping your hand over the intake while pulling the starting rope will occasionally pull enough vacuum to clear the snot around the jet.
__________________

__________________
sandy daugherty is offline   Reply With Quote
Old 04-09-2008, 14:32   #17
Senior Cruiser

Cruisers Forum Supporter

Join Date: Mar 2007
Location: Santa Cruz
Boat: Boatless Again
Posts: 4,324
Try a shot of quick-start (ether) down the carb. If it won't fire with that and a clean, dry plug, its an electrical problem.
__________________

__________________
donradcliffe is offline   Reply With Quote
Old 04-09-2008, 18:10   #18
Moderator Emeritus
 
Ex-Calif's Avatar

Cruisers Forum Supporter

Join Date: May 2007
Location: Singapore
Boat: Maxi 77 - Relax Lah!
Posts: 11,514
Images: 4
Is the engine running yet?

Check spark first - Remove the wire from the plug - Hold it with a pair of insulated handle pliers very close to the metal part of the engine.

Pull the start cord. If you get a spark you can eliminate any kill switches from the problem list.

If you get a spark, pull the spark plug. Look to make sure there is a small gap (a folded over matchbook cover should slide in) between the curved electrode and the center pin. Plug the wire in the spark plug. hold the threaded part of the spark plug against a metal part of the engine (not a painted part). Pull the ripcord. if you see a spark jump the gap, you likely have a fuel problem.
__________________
Relax Lah! is For Sale <--- Click
Click--> Custom CF Google Search or CF Rules
You're gonna need a bigger boat... - Martin Brody
Ex-Calif is offline   Reply With Quote
Old 12-01-2009, 03:09   #19
Registered User
 
Morgan 27's Avatar

Join Date: Jan 2009
Location: Beaufort SC
Boat: Morgan 27 OSPREY
Posts: 7
Images: 3
Send a message via Yahoo to Morgan 27
Getting spark??? That'll tell the tale on where to go... My buddy has one he simply refuses to work on and it's still running. Corrosion and all. The kill switch works by grounding out the spark so any wire disconnected to/from will take it out of the loop. Unscrew the plug, hold up to motor and spin 'er over. Spark should be visible in broad daylight!
Mike Sr.
__________________
So much for common sense...
Morgan 27 is offline   Reply With Quote
Old 12-01-2009, 06:50   #20
Registered User

Join Date: Apr 2007
Location: Florence, South Caroilna
Boat: Reniell, 1975 & 2600- lazy Dazs
Posts: 16
Send a message via AIM to wlshor
wON'T START

I had brought a new Nissan 9.5 and at the lauch the motor would not start. After many pulls. I removed the cover and found that the choke was closed. When I pulled the choke the first time. The plactic piece that connected the choke had pulled loose and left the choke closed. I reattached the plactic piece and pull a few times and motor ran fine. My lesson was be careful of not pulling the choke too hard and pulling the plactic piece loose.. Never had a problem since. Motor is two years old now.
__________________
wlshor is offline   Reply With Quote
Old 12-01-2009, 07:18   #21
Registered User

Join Date: Oct 2008
Posts: 205
To eliminate question of a fuel problem, spray ether starting fluid into the carb, wait a few seconds and pull the cord. If the engine fires, its a fuel prob, if it doesnt fire then its probably electrical. Bob
__________________
roberttigar is offline   Reply With Quote
Old 12-01-2009, 07:53   #22
Senior Cruiser
 
Talbot's Avatar

Cruisers Forum Supporter

Join Date: Jun 2004
Location: Brighton, UK
Boat: Privilege 37
Posts: 3,579
Images: 32
I dont really do very much to my outboard other than drain the fuel from the carb each time it is uded by letting the motor die by fuel starvation, and giving the cooling water passages a clean every couple of years.

Never had any real problem with either a yam 2hp or a tohatsu 3.5.
__________________
"Be wary of strong drink. It can make you shoot at tax collectors - and miss."
Robert A Heinlein
Talbot is offline   Reply With Quote
Old 12-01-2009, 09:14   #23
Registered User

Join Date: Oct 2008
Posts: 205
The most difficult part of solving a mechanical problem is deducing what it is. In the case of an outboatd not startingits either the fuel system or electrical. If ether gets it started then you can eliminate the fuel system as the problem. If it starts and stops, the fuel may have been contamiinated. If the engine doesnt fire at all, then its probably electrical. Bob
__________________
roberttigar is offline   Reply With Quote
Old 12-01-2009, 16:06   #24
Registered User
 
RBEmerson's Avatar

Join Date: Jan 2008
Location: SE PA
Boat: Baba 35 - One With The Wind
Posts: 392
Quote:
Originally Posted by midnightstar View Post
hey there!
my outboard wont start.just replaced the spark plug and cleaned the carborator.
electrical problem?
What does "cleaned the [carburetor]" mean? That is, did you disassemble or...? If you tinkered with the carb and didn't put it back together correctly, that'd kill the motor in a heartbeat.

Spark check: take the plug out, hold the threaded bit against the cylinder head, and pull the starter chord. A spark should show up across the plug's electrodes. BTW, make sure whatever you use to hold the plug in place is well insulated or you may find out, the hard way, there's a good spark.
__________________
S/V One With The Wind
'85 Baba 35
"You and I may agree, but we could both be wrong."
RBEmerson is offline   Reply With Quote
Old 23-06-2009, 21:50   #25
Registered User

Join Date: Jul 2008
Posts: 1
My Merc 3.5 did the same thing. Tohatsu makes them for Merc. It was the ignition module. I went through 2 of these engines. Trust me. Get it tested .
__________________

__________________
rlbrown is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Yamaha 4 or Tohatsu 6? CSY Man Auxiliary Equipment & Dinghy 20 19-08-2009 13:00
Flushing 5hp Tohatsu Boracay Engines and Propulsion Systems 2 10-06-2009 18:01
TOHATSU MOTOR HELP kar0154 Construction, Maintenance & Refit 0 18-09-2008 22:08
Honda 20 vs. Tohatsu 18 kitjv Engines and Propulsion Systems 0 17-06-2007 20:23
Tohatsu Outboards. Cool Change Engines and Propulsion Systems 10 08-12-2006 19:02



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 03:23.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.