Ski Boat Forum

Repairs and Maintenance => Engine Repair/Maintenance - All Ski Boats => Topic started by: Mike Harry on May 01, 2010, 06:11:46 AM

Title: Indmar 350 cooling
Post by: Mike Harry on May 01, 2010, 06:11:46 AM

When I purchased my boat there was no thermostat in the water neck housing. Is there supposed to be one? If so what temp should I buy?

Title: Re: Indmar 350 cooling
Post by: Mike Harry on May 01, 2010, 05:34:55 PM

Indmar answered my question for me, just so everyone knows incase you dont they should have a 140 degree T-stat.

Title: Re: Indmar 350 cooling
Post by: RonT on May 03, 2010, 07:28:37 AM

If a 140 deg. stat is hard to find many were changed to 160 deg. (most promo boats were switched to 160 to improve performance)

Title: Re: Indmar 350 cooling
Post by: Mike Harry on May 03, 2010, 07:48:49 AM

160 to improve performance...... 160 it is! Does that thing go in the housing the same as a car or upside down?

Title: Re: Indmar 350 cooling
Post by: Joel on May 03, 2010, 01:23:04 PM

Good question...  which side is up on the stat???  I always get that confused and have to reinstall - mechanically inclined I'm not...  :(

One more little project to do tomorrow... change out the thermostat to a 160 F type.  Gonna take her out on the lake Wednesday just for the helluvit... might as well run her with a new stat and see if there is any noticable difference!!!

Thanks ya'all  :)

Title: Re: Indmar 350 cooling
Post by: Midskier on May 04, 2010, 03:49:20 PM

pointy end up
like a car

Title: Re: Indmar 350 cooling
Post by: Mike Harry on May 21, 2010, 06:36:59 AM

Aright, another question on the T-stat....... Is there only to be one or two? If only one, does it go between intake and water neck, or inbetween the two parts of the water neck?

After I took it all apart to look at it, the water neck appears to have a ring in place where a T-stat should go...... I have only ever known to put one where the housing and the intake go together.

Any help would be great, Im looking to break in the 350 today and dont want to overheat.... She is brand new!

Title: Re: Indmar 350 cooling
Post by: Midskier on May 21, 2010, 10:36:18 AM

only one, it goes where the ring is, between the 2 parts of the filler neck
if you don't have a good gasket, scrap the old one away and use some good rtv sealant
around the perimeter of the housing b4 you put it together
keep an eye on the temp gauge you should be good to go

Dan T

Title: Re: Indmar 350 cooling
Post by: Mike Harry on May 21, 2010, 11:11:49 AM

Thanks Dan. Thats exactly what I did, but with a home made paper gasket as well! She is running and running good. Now to the hard work, finish the floor put in the carpet...... so on and so on! Oh well it least its running good and sounds good.

Thanks again