Oil Cooling System

[kdlklm]

I have a Honda GX 690 engine in my zero turn lawnmower, and on hot days it tends to get a little too hot, the ventilation doesn't seem to be quite good enough. It does appear to be set up to put a oil cooling system on it. I was just wondering if anyone has Put one on an engine similar to this.

[Richard Martin]

How do you know it's getting too hot?

[kdlklm]

the engine starts to run badly. And I have to pretty much shut it down. I've only got about 25 hours on the new engine, but I never get the problem in cooler weather. Only when it's really hot, and you can feel the excess heat coming off the engine.

[Richard Martin]

Originally Posted by kdlklm

the engine starts to run badly. And I have to pretty much shut it down. I've only got about 25 hours on the new engine, but I never get the problem in cooler weather. Only when it's really hot, and you can feel the excess heat coming off the engine.

Take it to the dealer and tell him what's happening. You should feel heat coming off of the engine. That's the cooling system doing what it's supposed to.

I can't imagine that the weather ever gets hotter there than it does here.

Does the engine ever smoke when you restart it after it's been hot? That is a symptom of overheating. Is it pushing oil out of the gaskets? Another symptom. Dos the oil smell burnt? For $25 you can send an oil sample to Blackstone Labs and they can tell you if your engine is overheating.

[robert@honda]

Which type of GX690 do you have? Is it the older model with the traditional cylinder head, or the new style with cylinder head/barrel? (see attached image)

Asking, 'cause the new style type is supposed to have better cooling than the old one. I do not see anything in the service materials that indicate there is an optional oil cooler (at least not from Honda).

-Robert@Honda

Caveat: I work for Honda, but the preceding was my opinion alone.

[rlitman]

Originally Posted by robertcoats

. . . I do not see anything in the service materials that indicate there is an optional oil cooler (at least not from Honda).

Maybe, but any engine that has an oil filter can be modified to have oil cooling.
I just wonder if that's going to help, since running an engine too cool can be harmful too.
Are you racing the thing?

The most important thing to do, is to make sure there's no debris preventing the full airflow over the cylinder fins.

[Downunder Bob]

I have always thought my 670 Honda ran hot.
It's on a 2004 mini-z.
I live in Nth Queensland where we don't get too much of a winter so most of the time it is fairly hot outside.
I seemed to be doing a lot of bottom seals on the engine so I decided to put a couple of these aluminum coolers on.
One for the transmission and one to help the original cooler on the engine.
As you can see where they are mounted they don't rely on air flow just heat dissipation thru the fins.

[Richard Martin]

Originally Posted by Downunder Bob

I seemed to be doing a lot of bottom seals on the engine so I decided to put a couple of these aluminum coolers on.

Your engine was showing one of the signs of overheating. Good call.