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View Full Version : how to tell the 351W HO from the plan 351W


DooSPX
07-19-2005, 08:38 PM
I finally just boat the boat that I have wanted since he taught me to ski 12 yrs ago. its a 92 ProStar. as some of you know, I was getting it, then he backed out. well, i got him now. just need to drive to WV to get it.
anyway, How can you tell if you have the HO motor?? he thinks its the HO 285hp but dont remember. it has a breather on the front of the driver side valve cover. the standard ones that I have seen, I dont think they have the breather?
please help???

Cloaked
07-19-2005, 08:45 PM
Engine number: third letter. If it's a "P", it's the HO model. Whereas a "D" in this sequence location is indicative of the 240HP engine.

Example: PLP-PRL-10PT

The engine number will be stamped on a metal stamped tag, bolted onto the engine (IIRC).

I think the heads are what makes the difference in the HP gain for the 285HP (but I know just enough to be dangerous).

east tx skier
07-19-2005, 08:48 PM
Sporty's on it, but you can also look to see if it's got the stock carb, it'd be a dual feed fuel line on the starboard side. Also, remember, that number is the engine number, not the hull ID number.

Cloaked
07-19-2005, 08:51 PM
I finally just boat the boat that I have wanted since he taught me to ski 12 yrs ago. its a 92 ProStar. as some of you know, I was getting it, then he backed out. well, i got him now. just need to drive to WV to get it.
anyway, How can you tell if you have the HO motor?? he thinks its the HO 285hp but dont remember. it has a breather on the front of the driver side valve cover. the standard ones that I have seen, I dont think they have the breather?
please help???Make him meet you in Knoxville. I know a place to run the boat and to have some cold beverages at a local marina.. :D :D I think that's only fair to meet part way... :D

FL - WV... That's a haul.... Thought about shipping it on a flatbed over-the-road truck line?

DooSPX
07-19-2005, 08:58 PM
thanks everyone. where is that engine tag located? is the valve covers different at all? lets see... the exhaust manifolds say MasterCraft power, the air cleaner/spark arrester cover says mastercraft power, the big muffler says silent power, valve covers says mastercraft power.
and the breather on the front cover on the drivers side bothers me... I think the two are differnt.

Cloaked
07-19-2005, 09:02 PM
The tag on my boat is located on the top / rear / center of the engine. It is an obvious metal tag that is secured under the head of a bolt.

BriEOD
07-19-2005, 09:03 PM
Most of that stuff is cosmetic. The exhaust manifolds with the MC power tell me you surely have an Indmar engine not a PCM. You could easily change out valve covers.

As these guys said the carb or the engine tag.

DooSPX
07-19-2005, 09:20 PM
the boat is 100% stock. so the Indmar, more pwr then a PCM.
anything else?
thanks so much guys. how do you know what trans you have?
but more concerned with the motor.

6ballsisall
07-19-2005, 09:24 PM
the boat is 100% stock. so the Indmar, more pwr then a PCM.
anything else?
thanks so much guys. how do you know what trans you have?
but more concerned with the motor.
Trans is easy to tell, you have 2 options. 1:1 or 1.5:1

2 ways to tell, there is a tag on the transmission that tells the ratio. Second way, if it has a 13 x 13" in prop and 1" shaft it's a 1:1 trans, if it has a 14 x 18" prop with 1 1/8" shaft it is a 1.5:1 trans

east tx skier
07-19-2005, 09:24 PM
Look at the engine shroud over the flame arrestor. Does it have a little sticker that says "285"? Not the most reliable way to tell, but not a bad indicator.

east tx skier
07-19-2005, 09:26 PM
the boat is 100% stock. so the Indmar, more pwr then a PCM.
anything else?
thanks so much guys. how do you know what trans you have?
but more concerned with the motor.

If it's stock, it's indmar. No noticeable power difference. Both using Ford 351. PCM offered the HO as well. Only difference between standard and HO are the GT40 heads and the 4010 carb on the HO stock.

DooSPX
07-19-2005, 09:32 PM
thanks... I know its a holley, with a electric choke.

east tx skier
07-19-2005, 09:35 PM
Just look at the number of fuel lines going to the carb. The 4010 will have a forked fuel line parallel to the carb on the starboard side. The 4160 is a single feed that comes up on the port/front of the carb. I tossed the 4010 and went to the 4160. You'll both hear good and bad things about the 4010 (just not from me). I only have bad news on that one. A guy going by PegLeg seems to have a way to make it work though.

I'm not trying to scare you on that one. Just take a long test drive and make sure you shut it down and restart a lot once the motor's good and hot.

DooSPX
07-19-2005, 09:39 PM
Just look at the number of fuel lines going to the carb. The 4010 will have a forked fuel line parallel to the carb on the starboard side. The 4160 is a single feed that comes up on the port/front of the carb. I tossed the 4010 and went to the 4160. You'll both hear good and bad things about the 4010 (just not from me). I only have bad news on that one. A guy going by PegLeg seems to have a way to make it work though.

I'm not trying to scare you on that one. Just take a long test drive and make sure you shut it down and restart a lot once the motor's good and hot.

thanks, I did drive it. just no more than 3 days ago. just got back to FL from WV visiting him (long time friend) and family. shut it down after a long pull, and starts up first shot. it runs like the day it was new.

east tx skier
07-19-2005, 09:41 PM
That's great to know. Maybe it's the standard 351 ;)

DooSPX
07-19-2005, 09:50 PM
it runs about 42-43 on dialed in speedo's same as it did new. had it at WOT for a little bit and ran 42-43 with 4 160-190 adults the other day

east tx skier
07-19-2005, 10:05 PM
That's what the manual lists as top end for both engines. That said, my 205 with the 285 hp would do 45.5 with the stock setup (before the new prop, carb, and intake). All I do is ski though, so the only time I see it is when I'm airing it out a bit.

DooSPX
07-20-2005, 05:23 PM
thanks everyone.

G-man
07-20-2005, 05:43 PM
if all spark plugs can come out with a spark plug socket it's a 351w. If you tear skin off your knuckles and use a short open ended wrench because you can't use a sparkplug socket it's a HO 285

east tx skier
07-20-2005, 05:51 PM
I use a box wrench on mine. Moreover, if you hail obscenities at your engine while working on the rear, portside plug, it's a Ford. If you can swap 'em out in 5 minutes, it's a chevy.

rasmithaz
07-21-2005, 12:20 AM
George and East texas skier''''''''''''''' I feel your pain. You guys should seek shelter. My nuckles are bleeding from a spark plug replacement in 110 degree heat but youz guys have a hurricane coming. DUCK!

G-man
07-21-2005, 09:38 AM
Were too far north for the hurricane, we won't even get any rain.

martini
07-21-2005, 10:06 AM
The quickest way to tell if it has GT-40 heads, is to look at the front or rear of either head. There will be 3 vertical bars that were cast into the head to identify them as such. If it is not a GT-40 you will most likely have 2 bars or even 1. The GT-40P heads have 4 bars cast into the head. You see where this is going. I'll try and find a picture of what I am talking about.

martini
07-21-2005, 10:18 AM
Here is a picture of the GT40P head, note the casting bars(there are 4 of them). The original GT40 will have only 3 casting bars.

stumbledog
08-24-2005, 06:27 PM
I only see 3 bars?

H20skeefreek
08-24-2005, 07:00 PM
I only see 3 bars?
you been drinkin' sterno?

stumbledog
08-24-2005, 07:41 PM
I would define the bar as the raised portion. As I look at my heads (which I think are the GT40's), I see the difference.

Besides sterno is nasty.

airdrew99
02-26-2006, 09:58 PM
The heads on my 91 Prostar have two raised bars. So does that mean it is a 240hp engine?