Re: 1988 Johnson 225 hp VRO Alarm
...Still need to find where the pulse limiter screws into the crankcase. Any ideas on that? It cannot be more than 6.25 in. from the bottom of the VRO pump because the parts book shows how long the attaching hose is.
I really don't know how similar your '88 225 is to my '90 200, but I'd bet "pretty darn"
OK, I've been thinking and the only way I think I can help is to trace the pulse tube from the VRO/OMS pump back to the pulse limiter. Look at every hose that is connected to your VRO/OMS pump. There will be 4:
Gas In
Oil In
Fuel (gas/oil) out
Pulse fitting.
Look at the diagram on this website
http://continuouswave.com/whaler/reference/VRO.html
The first three should be dead obvious, and therefore the fourth one is the pulse inlet.... trace this to the pulse limiter which should be screwed into the crankcase (like mine) or maybe inline (I don't think V6's are inline).
As the article points out, the "old" pulse limiters have a black face, the new ones are obviously blue metalic color. I don't have a photo, but again, if you trace the hose from the pump fitting to where it ends - that will be the pulse limiter. If yours isn't blue, it should be changed. I had to change it on my '90, so if you haven't had that done, I'll bet you need a new pulse limiter. If you're lucky, that's the entire problem. Wouldn't that be great? (PM me; I have an extra, brand new blue pulse limiter that I'll mail you free just to get it out of the "box of stuff"!)
Hope that helps.