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View Full Version : Need some pics of Indmar 351


learjet2230
12-29-2007, 11:05 AM
Folks,
Looking for some pics of the PCV setup on the right hand valve cover of an Indmar 351. I have an 88' 190. I think the setup is supposed to have a PCV valve in the right valve cover. A hose then routes to a base plate under the carb. Under high manifold vacuum conditions, it burns all the crankcase vaopors. The other valve cover is routed up to the flame arrestor. My boat has the performer manifold on it, and I think the base plate has been removed due to a clearance issue with the cover, but not for sure. So what they have done on my boat is simply put a cap in the right valve cover that has a filter in it. It vents directly in the engine compartment, which = no good in boat lingo. After a day of skiing the engine has a fine oil mist on the valve covers. This is just a pain to clean and it is unsafe. Anyone that can post pictures of the proper setup would be a GOD in my eyes. Once I get the internet setup at my house I will get some pics up of my setup. We are not stock!!:D
Nik

Covi
12-29-2007, 11:28 AM
I'll see what else I can come up with

Covi
12-29-2007, 11:30 AM
I think I may have one more

learjet2230
12-29-2007, 11:31 AM
Helps a little, but that is a PCM motor.

learjet2230
12-29-2007, 11:32 AM
dbl post!..................................

Covi
12-29-2007, 11:32 AM
Have to get back to work now. But, I hope these helped

Covi
12-29-2007, 11:33 AM
I'm an idiot I thought it was for a PCM. I'll read closer next time. My bad!

learjet2230
12-29-2007, 11:36 AM
No no, definately helps me. I think this is going to be about the same setup!! Appreciate the help.

BrianM
12-29-2007, 12:30 PM
The PCV setup on the PCM and Indmar is the same. Here is a picture from my old '88 190 with the Indmar.

BrianM
12-29-2007, 12:32 PM
And one more. If the carb has been replaced the newer version of the 4160 has the vacuum nipples built into the base of the carb. On the original carb there are no nipples on the carb itself but as you stated the small riser plate has it.

learjet2230
12-29-2007, 12:32 PM
Ok that is the motor. So I am missing the carb spacer plate! Anyone know if the performer manifold with that plate is going to create a clearance problem?

BrianM
12-29-2007, 12:35 PM
Probably will. Check the base of the carb to see if you have a vacuum port that is capped on it. If so you can use that. If not you can get a low profile flame arrestor from DIM. You can also probably pull one of the plugs out of the manifold and add a fitting so you have a vacuum port straight from the manifold. Doesn't really matter where exactly you are getting the vacuum from.

climbinggod
12-29-2007, 01:30 PM
My 351 Indmar engine does not have a PCV valve going to the spark arrestor. Should I be buying a new arrestor and valve cover cap with a PCV valve in???

hester
12-29-2007, 01:40 PM
Here is mine, hope it helps. Looks like I've got the vent cap you mentioned but I've not had a problem with oil mist. Post your setup when complete.

climbinggod
12-29-2007, 02:40 PM
My 351 Indmar is exactly like hester's and I don't have a problem with oil mist either.

learjet2230
12-29-2007, 05:59 PM
There is nothing wrong with your setup. Only thing is I would think twice about putting that vapor under your engine cover. The proper setup for your boat would have a tube coming from the oil cap up to the flame arrestor. There is not supposed to be a PCV valve in this line. Just an open line that burns vapor. The reason I get the oil mist is because my filter is opposite of yours. As the boat is coming out of the hole, all the oil in the rockers goes to the back of the cover and mist's heavily. Once I get home I will post some ics. I'm in Austin are right now. Just had to replace exh manifolds, risers, circ pump, distributor, and impellor. Cha ching!!! But runs like a raped ape right now!! Got some carb tweaking to do. Secondaries need to be adjusted a little, and I'm going to 86 my mufflers for straight pipes! Remember, loud pipes save lives!!

Hunterb
01-03-2008, 01:51 PM
I have the same set-up as hestor. I don't think it should have a misting problem as the cap on the left side of the motor should have air going IN only and the other side has the air going OUT and routed into the intake via the carb base plate. I think the only reason that some boats have the hose going up to the spark arrestor is to get some filtration of the air going into the crankcase.

Bruce

Laurel_Lake_Skier
01-03-2008, 02:42 PM
The cap is designed with a filter element inside of it. Engines that run the hose up to the air filter have the filter up there. You should not have mist coming out of the filler cap or into the air cleaner if the hose runs up there. As was mentioned, air should be entering the crankcase at that point. The mist would indicate a clogged PCV valve or excessive blow-by (likely worn rings).

east tx skier
01-03-2008, 03:56 PM
I'm late, but I'm still posting old engine pics!

http://i82.photobucket.com/albums/j262/dnortonames/MasterCraft%20Pro%20Star%20205%20For%20Sale/IMG_0029.jpg

With the stock flame arrestor and a spacer under the carb, you may run into clearance problems. I did on my 93, but the 93 engine box was smaller.

Unfortunately, these are harder to find than they used to be.

http://i82.photobucket.com/albums/j262/dnortonames/MasterCraft%20Pro%20Star%20205%20For%20Sale/MotorBoxInsulationModification2.jpg

But if you can get a low profile flame arrestor, do it. Mine wasn't plumbed into anything from the flame arrestor, but the spacer was plumbed to the starboard side valve cover.

Another option for gaining space is to build a collar for your engine box to raise it off the floor. There was a guy on CCfan that did that and it looked pretty slick. Can't remember who it was, but TRBenj could tell you.

Also, check your throttle cable to make sure it's running close to level. Mine required a bracket to keep it from binding up after everything got raised up 1.5".

learjet2230
01-03-2008, 05:46 PM
Well I took some pics but cant upload them because of size. Any ideas??

east tx skier
01-03-2008, 06:07 PM
upload to photobucket and hotlink.

learjet2230
01-03-2008, 06:16 PM
ughggg! What a PITA!

learjet2230
01-03-2008, 06:25 PM
http://i263.photobucket.com/albums/ii128/learjet2230/100_3702.jpg try this. Set up not complete yet. Obviously hose is to long and I am hunting down a 90 for the manifold.

east tx skier
01-03-2008, 06:27 PM
http://i263.photobucket.com/albums/ii128/learjet2230/100_3702.jpg try this. Set up not complete yet. Obviously hose is to long and I am hunting down a 90 for the manifold.

If you're talking about the PCV valve Motorcraft 90 degree is Part number EV-68 2F16

learjet2230
01-03-2008, 06:28 PM
It worked!!!! Holy shiite!!! Here is another!!
Notice the new manifolds and risers! Got a sweet deal and anyone interested in getting new ones I found them cheaper than DIM. Whole setup for risers, manifolds, gaskets, bolts, etc.....shipped to me was less than $500. DIM was almost $700.

http://i263.photobucket.com/albums/ii128/learjet2230/100_3701.jpg

east tx skier
01-03-2008, 06:29 PM
Obviously hose is to long and I am hunting down a 90 for the manifold.

Motorcraft makes a good 90 degree.

/edit. Never mind. I can tell from your picture that you're talking about the intake manifold for the 90 degree piece.

learjet2230
01-03-2008, 06:32 PM
I expect #4 to burn a little crappy, but this was the suggestion of DIM. Notice my valve cover setup is a little different than the previous posts. I would suspect they need to put them up to the flame arrestor as well!

east tx skier
01-03-2008, 06:38 PM
Off topic, but where in TX are you (noticed the tag).

learjet2230
01-03-2008, 06:41 PM
Granbury, SW of Ft. Worth about 35 miles!

east tx skier
01-03-2008, 06:56 PM
Ah, yes, very good place to have a ski boat.

learjet2230
01-03-2008, 06:59 PM
Sitting in the boathouse right now waiting for me to turn the key....sort of!!