Have a pair of 1990 Merc 525SC's (rebuilt in '98, 250 hrs.)
Was wondering if long idles (parades, etc.) would have any adverse effects on the engines.
Engines idle fine, have had no problems with them...yet. Don't want to unnecessarily create any either. Thanx for any input.

For the most part long idling periods can create condensation in an engine. You also want to make sure that plenty of oil is getting to the lifters. Long idling periods are what can hurt lifters.

When Idling or just going slow about every 2 min or so I will take it out of gear and rev it up to about 2000 rpm for a few seconds just to keep from loading up the plugs. This will also boost the Oil pressure up and give it a shot of extra water. Wether it makes any real difference or not I dont know. But it sounds cool

Thanx for the input
The motors do have high vol. oil pumps which should help, correct?
I guess revving them up every so often should help prevent any problems.

If I'm idling for a long time I only put one engine in gear and let the other idle up a bit. After a while, I switch which one I have in gear.

Kcool,

Curious why you are asking the question... I have three of them and have never encountered any problem at all... For the most part I have found them to be turnkey and as long as the Dominators are properly set no loading or or plug issues...

Tnx, Karl

PS... Only problem I have found is the amount of gasoline they
that flows through them...

Haven't had any problems with them either, never had blowers b4 and was curious if long idle periods might be and issue. Used to have an HP500 and it would load up after exteneded idles, but had no problems with it either. Those dominators are thirsty aren't they!

Was thinking about putting fuel pressure gauges on them, where would be the correct place to put them, use electrical or mechanical gauges?



Thanx for the replies

Kcool,

Since I am still using mechanical pumps, factory and they fail on a yearly basis, I have not added gauges yet... I plan to go electric
this winter and will place between the pumps and the carbs... Most likely in the metal lines near the carbs inclusive pressure regulator... Just to be clear the failure is that the pumps leak fuel into the sea pump drive cavity... I have not done any checking on what pump or regulator to use so if you have any thoughts on the matter I would appreciate hearing your thoughts...

Tnx, Karl

Mine are also mechanical, no problems yet....but I was also thinking about going to electrical. Haven't looked into it yet either. Keep me updated. Thanx

G.. and Kcool,

Just a thought... You may want to pull the level check below the fuel pump just to make sure the lubricant hasn't become gasoline... That's the problem which I keep having... I will let you know after gathering some information on the electric situation...

Tnx, Karl