H.P. 500 rev limiter
 

Can anybody tell me where the stock rev limiter is located on a 1999 Merc Racing H.P. 500 ? I have an M.S.D. ignition box with a Jacobs coil . What is the stock rev limit and at what r.p.m. can this engine be safely run ? Thank you kindly .

Stock rev limit is 5350rpms. They will run best if propped for 5200-5300. They could actually be run a couple hundred rpms higher without any problem.

Thanks Griff . Can you tell me where the rev limiter is located ? I'm still running the stock distributor .

There is a plug in on the msd that will tell you the rev limiter limit.. Go to msd and down load a pdf of it and you will see it

Its under the Mercathode on the steel bracket.

Its Part #41 if you have a TB IV ignitionhttp://www.mercruiserparts.com/Show_...CAL+COMPONENTS

Not that it matters much, but page 57 of the owners manual in the "Engine Specifications" section says the rev limit is 5400 RPMs.

Still friends Griff? :angry-smiley-038:

A 99' will be TBV
the rev limiter is built into the ignition module

# 38 in this picture

http://www.mercruiserparts.com/Show_...p?dnbr=853984R 1&ivar=images/CRUISER/853984.R1/5.png&inbr=2450&bnbr=5&bdesc=ELECTRICAL+COMPONENTS +%28SERIAL+%23+0K000001+THRU+0L001772%29

So, i guess if i don't have the box with the built in limiter or the soft touch rev control i be runnin without protection :eek: Glad i've been quick on the throttle . Thanks for the info guy's . Will check to see what i have when it warms up a little . 17* this morning :eek:

Oh , so i am ok ? while i was at MSD you guy's posted . Thanks again .

If you have removed the stock merc ign box you will not have a rev limiter unless your msd box hase one. griff is right on with the rpm's. what limits them is your valve train.
I also run the stock merc hall efect dist in my hp500's but i run the msd 6al-2 ditigal box's with these you can program your own timing curve and rev limit right off your laptop. they work very nicely.