1992 omc 4.3 really hard starting

[jimmyhat]

I had my four winns over heat and i replaced the impeller. But now it is really hard to crank when cold. It burned up a positive cable on me . When the boat is warmed up it starts easy and runs good. I was told it may be a head gasket because i did have water in my oil and on the back left spark plug. Please any help at all before i pay a shop to work on this .I have only owned the boat for 3 months..

 

[Reel Poor]

Re: 1992 omc 4.3 really hard starting

I believe you have probably been given a very good idea of what your problem may be. Pull the plugs then spin the engine over with the starter and see if water is pumped out of the plugholes. If it pumps water it has either a bad head gasket or a bad exhaust manifold.

 

[jimmyhat]

Re: 1992 omc 4.3 really hard starting

How will i know if it is the head gasket or the exhaust manifold and is it harder than working on a car motor?

 

[Reel Poor]

Re: 1992 omc 4.3 really hard starting

You would need to do a cylinder leak test on the engine.

How To Do A Cylinder Leak Test

 

[Bondo]

Re: 1992 omc 4.3 really hard starting

"But now it is really hard to crank when cold. It burned up a positive cable on me ."

That alone tells me that your Wiring is in Need of Removal,+ Cleaning............

You Need Shiney Clean wiring Ends........

And,....... Don't forget the Grounds.........

 

[cobra 3.0]

Re: 1992 omc 4.3 really hard starting

I suspect both are blown. Been there and done that very recently on my 3.0. Work is the same as on a "car" motor.

 

[jimmyhat]

Re: 1992 omc 4.3 really hard starting

ok so i need new exhaust manifolds or just the gaskets?

 

[jimmyhat]

Re: 1992 omc 4.3 really hard starting

lso where is a good place to get a repair book cheap?

 

[cobra 3.0]

Re: 1992 omc 4.3 really hard starting

1. gaskets, but you may need to have them plained on a surface sander if they're not flat.

2. ebay

 

[jimmyhat]

Re: 1992 omc 4.3 really hard starting

Well to change the head gaskets don;t i have to pull the exhaust manifolds anyway?

 

[Gary H NC]

Re: 1992 omc 4.3 really hard starting

You will have to pull exhaust manifolds,intake manifold,distributer,ect..
Make sure you use marine head gaskets..
I got all my 4.3 gaskets from Napa,they are made by Sierra..
A leak down test is the way to start.

The only cheap manual would be the Seloc manual# 3404
not the greatest but gives you something to go by..
best to look on Ebay for the original OMC manual..

 

[cobra 3.0]

Re: 1992 omc 4.3 really hard starting

I bought my gaskets from BRP (Evinrude Johnson dealer). NAPA was way more $ when I checked with them.