Carb rebuild

mikeregas

Cadet
Joined
Jun 7, 2008
Messages
13
I have a 98 Mariner and I have gotten my money out of it over the past nine years. It is starting to show its age though and I was wondering what I should do beside the obvious maintainance, changing the plugs, fuel filters and water seperators and gear case oil and impeller. When do I have the carbs rebuit? Should I just take it in and bite the bullet and pay a mechanic?
 

tashasdaddy

Honorary Moderator Emeritus
Joined
Nov 11, 2005
Messages
51,019
Re: Carb rebuild

the carbs are due. impeller way past due, should be every 2 years, for safety. plugs, filters etc every year to 2 years. if you are not mechanically inclined, and don't have a service manual. bite the bullet.
 

Chris1956

Supreme Mariner
Joined
Mar 25, 2004
Messages
28,074
Re: Carb rebuild

Mike, If you have kept fresh fuel in the motor over it's lifetime, and the motor runs well and the carbs don't leak, just continue with the normal maintenance items. Keep an eye on the electrical connections, keep up with the grease fittings, and watch for surface rust. Especially check the gearcase oil for water intrusion and change appropriate seals.

If you never have replaced the waterpump impeller, it is time to do that.
 

dingbat

Supreme Mariner
Joined
Nov 20, 2001
Messages
16,313
Re: Carb rebuild

Replace all the hoses as well. You're past their useful life especially if you're now forced to use E-10
 

haskindm

Petty Officer 1st Class
Joined
Jun 12, 2008
Messages
255
Re: Carb rebuild

Don't rebuild the carbs unless you have to. The other maintenance suggested is good, but carbs are tricky. If it ain't broke, don't fix it, you may never get them right again. If they are leaking or the engine shows signs of running too rich, you may have to have them rebuilt, otherwise leave them alone. Also do a compression check on the engine which would give some indication if you have a ring problem developing. Nine years is nothing to a properly cared for outboard. Ran my last outboard for 22 years and then sold it to a friend who is still running it. Only major work done was replacing the stator and rotor as the wiring had dry-rotted.
 

john from md

Commander
Joined
Apr 13, 2008
Messages
2,184
Re: Carb rebuild

I agree with the don't fix it if it ain't broke. Do a Seafoam decarb treatment and this will also clean out your carbs. Treat any corrosion with either Boeshield T9 or LPS 3 and check your nuts and bolts for security. If it is running fine, don't mess with a good thing.

Regards,
John
 

tashasdaddy

Honorary Moderator Emeritus
Joined
Nov 11, 2005
Messages
51,019
Re: Carb rebuild

this is a misconception. "Do a Seafoam decarb treatment and this will also clean out your carbs."

Seafoam will keep a clean carb cleam. i will not clean a dirty carb.
 
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