heat exchanger

Hi CSRs! Been lurking on here for a while, and this community has already helped me figure out a bunch of stuff for my 1990 270 DA and 1980 260 DA. But now the 1990 7.4 L Mercruiser is having a strange coolant issue that has me stumped. When the engine runs up to temp, the coolant recovery...

Boat: 03 Sundancer 380; Gas MerCruiser 8.1S Horizons Owner for 33 months, Moored in freshwater, cruise in salt water Aliya here. New to the forum but have met many of you at SeaRay events. I'm pretty darn handy and have fixed the generator, done electrical and crawled in spaces you shouldn't be...

I have a heat exchanger that needs to be replaced in my 2003 340 Sundancer (496 engines). I have the part number but here in Ottawa the price from Mercury Canada is $1700! On-line in the US they range around $900 +/- . I haven't purchased any parts from a US on-line site (its a new boat for...

Just ordered all new hoses, clamps, orings, temp regs, radiator caps etc to re do everything on the sea water side of the cooling system. What's the best way to clean the fuel coolers, heat exchangers and transmission oil coolers? I was thinking that soaking them in a cleaning product and...

Hi, I have a Sundancer 240 and plan to keep her moored over the winter. I hope to use her about once a week (depending on the weather). The temperatures here over the winter does not usually drop below -5C (23F) and the seawater does not freeze. I plan to put RV antifreeze through the...

This post is long overdue and I’m sorely in need of the advice of my fellow Sea Ray owners. Sorry it’s a little long, but I want to be thorough. Background: SEP ’09 - Purchased ‘04 260 Sundancer 350Mag B3 with verified 15 hours on engine. Boat was used in salt water, but equipped with fresh...

I have searched, but haven't found the information I need on this-so I am seeking wisdom. Background...2003 380DA. About two weeks ago the Only Mate noticed a mildewy aroma. I did the basics and everything looked fine. Last week I noticed the water pump was running suspiciously when the faucets...