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1996 Johnson 130hp

F

fish&chicks

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Last year after running for about 45 mins the engine bogs down, pull back on gas and back to full it runs ok. This year it is happening more regularly and at low speed. I see oil and gas in the carb cover. I changed fuel line from tank to engine, filter, water seperator, and bulb, new plugs etc. Need help to point me in the right direction, fuel or elec. Do not wha t to take it back to mechanic as to the last bill of over 2k for rectifier problems. Thanks..
 
Re: 1996 Johnson 130

Does the fuel primer bulb have a tendency to be drawn flat when this problem takes place? If so, there is a fuel restriction between the primer bulb and the fuel supply.

(Fuel Anti Siphon Valve)
(J. Reeves)

Many of the later OMC V/6 engines incorporate a fuel restriction warning via a vacuum device attached to the powerhead. If the engine overheats, or if you have a fuel restriction, the warning is the same.... a steady constant beep.

NOTE... Only the V/6 & V/8 engines have the above "Fuel Restriction Warning". The warning horn will not sound on the other models.

The fact that a engine is not overheating, but the warning horn sounds off with a constant steady beep, and that the rpms drop drastically would indicate that the engine is starving for fuel due to a fuel restriction. Check the built in fuel tank where the rubber fuel line attaches to the tank fitting. That fitting is in all probability a "Anti Siphon" valve which is notorious for sticking in a semi closed position. It will be aluminum, about 2" long, and the insides of it will consist of a spring, a ball, and a ball seat. If this valve exists, remove it, knock out those inner components which will convert it to a straight through fitting, then re-install it. Hopefully that cures the problem.

The above procedure will cure a restriction problem with the anti siphon valve as stated. BUT, it may also allow fuel to drain backwards to the fuel tank when the engine is not running (siphoning backwards) due to the fact that the carburetors/fuel pump etc are higher than the fuel tank. This condition is not an absolute as the valves in the fuel primer bulb usually prevent this backwards siphoning problem. However.... if this does take place, the cure would be to install a new anti siphon valve.


Thousands of parts in my remaining stock. Not able to list them all. Let me know what you need and I'll look it up for you. Visit my eBay store at:

http://stores.ebay.com/Evinrude-Johnson-Outboard-Parts-etc?refid=store
 
Re: 1996 Johnson 130

My 130 is a V4. The fuel bulb did colaspe at one time. I changed the bulb and all of the fuel lines, with staneless steel crimps. I did notice when I was running the motor at home with ears that the port side block was running hotter than the other, will this be a problem, and changing the thermostate will help. any help will be greatly appreciated..
 
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Re: 1996 Johnson 130

Yes, I know that your engine is a V4. The explanation of the anti siphon valve was taken from my database and simply includes the V6. If you haven't checked for a faulty anti siphon valve yet, do so in order to eliminate that possibility.

The fact that the engine runs normal for 45 minutes eliminates the possibility of fouled carburtors. And if overheating was an issue, the overheat warning horn would sound long before the engine got hot enough to cause that problem.

Check the warning horn for proper operation by having the key in the ON position, then grounding out the heat sensor wire that you sae protruding out of one the cylinder heads. The horn should sound. (No need to have the engine running).

Thousands of parts in my remaining stock. Not able to list them all. Let me know what you need and I'll look it up for you. Visit my eBay store at:

http://stores.ebay.com/Evinrude-Johnson-Outboard-Parts-etc?refid=store
 
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