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ttu
10-23-2007, 12:30 PM
this is my 1st inboard with a heater. 07 x2.

is it me or does the thing not put out much heat and does not seem to blow very hard.

any ideas.

etakk7
10-23-2007, 12:33 PM
is it blowing hot air? If not, one of two things. Have you tried at at a speed other than idle? Is the input valve to the heater core open (similar to a garden hose turn on)?

bigmac
10-23-2007, 12:55 PM
They're notorious for not putting out much heat, especially at idle. The solution is to add a Y-pipe, which will change the return line from the circulating pump where it is now to upstream of raw water pump. Pretty easy install. Works very, very well. Y-pipe from SkiDim... (http://www.skidim.com/prodinfo.asp?number=H424)

http://www.skidim.com/images/21505.jpg

88 PS190
10-23-2007, 12:59 PM
The Y pipe is basically a siphon pump, and will suck water from the heater back into the system under a vaccume.

It does fix the problem by putting suction on the back side instead of just relying on the slight pressure on the front.

ttu
10-23-2007, 01:22 PM
you can feel some heat from the vent by the driver but the 2 tubes located behind the driver there is hardly nothing.

88 PS190
10-23-2007, 01:45 PM
2 part solution, increase flow of hot water to heater core, increase fan power.

This is why it works best to build your own in some cases. The fans from the normal type is basically a blower. If you got one of those hamster cage type blowers mounted to the box you would have a ton of air flow.

All these boats use heatercraft or whatever heaters... which are not great.

JerryS
10-23-2007, 01:49 PM
I have an 06' 197 with the 200H Heatercraft. I've ben researching my lack of flow and heat as well. It doesn't put out much airflow to the kickpanel vent on the drivers side. The hot tube under the passenger seat has pretty good flow. I've looked at it and I'm pretty convinced the airflow issue to the kickpanel is because of the awkwardly routed ducting. The ducting to the hot tube is a straight shot. I was gonna tackle the kickpanel's weak flow by re-routing or straightening the duct. It's also interesting that the 200H has a 3 speed fan (172,228, and 263cfm), yet Mastercraft's switch is a 2 position switch. I'm wondering if they utilize the 228/263 combo or perhaps the 172/228 combo. I note little difference between the 2 fan speeds, so I wasn't too convinced they used the 172/263 combo.

I've also noticed that the airflow is just not very hot. Realistically, the most important time I want heat is after I get out of the water in the fall - and at that moment - the boat is idling at 660rpm.

According to Heatercraft, until the engine is turning 1100-1600rpm, there simply isn't much (or any) flow to the heatercore, hence the low output of heat.

One solution is to mount the H415 circulating pump/switch. (about $100-140 on ebay typically) This will circulate water to the core when you are sitting there at idle, increasing your heat output when you want it most. The other is the "Y" from Ski_dim. The "Y" is much cheaper. The "Y" is also available from Heatercraft. Take note of the description...and then compare that to the Mastercraft factory install and note the lack of the "Y" hmmmm....

http://www.heatercraft.com/ProductInfo.aspx?productid=H424

Ultimately I would probably replace my 200H with the 300H, which has a much more substantial motor combo along with higher output.

Does anyone have pics of where exactly to install that "Y"?

Jerry

bigmac
10-23-2007, 03:59 PM
Thermodynamically speaking, I don't understand how increasing air flow increases heat output if the water in the core isn't hot.

IMHO, a bigger fan and a bigger heat exchanger won't do a thing unless the water circulation is changed to allow the water in the heater core to be hot enough. You can get only so much heat out of a lukewarm heat exchanger, and increasing airflow won't help it.

As to decreased airflow from the kick panel...be aware that those louvers will open and close, and that vent is notorious for closing itself and decreasing airflow through that vent - an oft-reported problem here. I spent time trying to track down that very problem on my boat, including trying to evaluate the routing of the vent hose. I solved the problem short term with a zip tie (securing the "self-closing vent" open) and definitively solved it by replacing that kick-panel vent with a hot tube.

Holman J.B.F
10-23-2007, 04:22 PM
wich engine ?.it seems the LY6 have more problems with the heater..i,m trying to find an alternative route for waterflow,sofar no luck.

VTJC
10-23-2007, 04:42 PM
Does anyone have pics of where exactly to install that "Y"?


The Y-pipe is installed on the inlet side of the RAW Water pump. It makes a substantial difference, particularly at idle.

Jamie

Roonie's
10-23-2007, 04:56 PM
Glad I saw this thread as I was thinking of adding a heater to my boat. I don't think I will now if it is weak.

ProTour X9
10-23-2007, 07:59 PM
Our heater isn't as warm as the old boat either.

skeeler
10-23-2007, 08:01 PM
Not sure what the problem is guys, but my heater was the best thing I ever did in my '07 X-2. Blows out great, and very warm!!

SkiDog
10-23-2007, 08:16 PM
Here in the south I almost never have to use my heater. The factory screwed up when building my boat, and threw in a FREE heater.

lav
10-23-2007, 09:09 PM
i'm with skeeler best thing i added to my boat,while above 1200rpm excellent heat at idle with Y pipe good heat

bigmac
10-23-2007, 11:19 PM
Same here. H200...very warm. Weak at idle, fixed with a two minute install of a Y pipe.

06' X-2 R8R H8R
10-23-2007, 11:42 PM
My cranks the heat out too, maybe you got a kinked hose or the hose could have gotten seperated at the heater. Mine did that at first and had to get it redone. Other than that the kids love the heater.

06' X-2 R8R H8R
10-23-2007, 11:42 PM
My cranks the heat out too, maybe you got a kinked hose or the hose could have gotten seperated at the heater. Mine did that at first and had to get it redone. Other than that the kids love the heater.

06' X-2 R8R H8R
10-23-2007, 11:43 PM
oooooooooooops sorry

JerryS
10-24-2007, 12:05 AM
My kickpanel vent doesnt close. It only rotates.

My buddy has a Bu, he has a Euro Vent under his dash that does close. He also has substantially more airflow than I do. I'm not sure which heater those guys use, or how its installed. Haven't looked.

I'm gonna install the Y for sure.

I believe the heater return goes directly into side of raw water pump now , doesn't it?

Jerry

bigmac
10-24-2007, 07:57 AM
I believe the heater return goes directly into side of raw water pump now , doesn't it?

Jerry

These are the instructions that come with the Y adapter.

ttu
10-24-2007, 08:50 AM
thanks bigmac,

looks like a have a simple winter project.
8p

JerryS
10-24-2007, 04:35 PM
That explains it. Thanks for posting that. Good info. I had my raw water pump confused with the main pump.

Jerry

wayne99
05-30-2010, 03:07 PM
My heat seems pretty decent. it's just my fan speed. How do I increase fan speed in my 02 Mastercraft X9?

Thanks

mcmx2
09-07-2010, 09:09 AM
I realize this thread is 3 years old but I wanted to know if anybody has a permanant fix for the self closing vent on the kickpanel. My heater vent will close itself as soon as I start the fan and with the cool fall coming I need to get this issue resolved so my driver/wife will go out and drive the boat. Thanks

j4rowell
04-20-2011, 07:43 AM
Does anyone know if the ski dim price of $34 comes with everything needed or just the y? Heatercraft says for $60 (price including shipping) it comes with the whole kit...

j4rowell
04-20-2011, 09:36 AM
Nevermind. Got my answer. Doesn't come with anything but all you'll really need is a hose clamp.

medicmoose
04-21-2011, 04:59 AM
The "return heater line"....is that the upper or lower hose coming out of the circulating pump?

j4rowell
05-06-2011, 06:20 PM
The "return heater line"....is that the upper or lower hose coming out of the circulating pump?

I have the same question. 09x2. Can someone post a pic of where their y pipe is?

catamount
09-06-2012, 10:36 PM
Bump in the case that anyone has a picture of this Y pipe installed.