Overtemp only when on plane

Dave R · 08-27-2018, 08:46 AM

I have a Mercruiser Bravo drive (which is a very similar design to the VP you have) and mine was leaking in the same exact place and had the exact same symptoms you described earlier this season. The bravo uses a somewhat different attachment method to connect the hose to the gimbal housing, but a leak there results in the same problem you are having.

Woodsy · 08-27-2018, 09:01 AM

While you are pulling it apart to fix the air leak... replace the raw water pump too. Cheap insurance.

Woodsy

Dave R · 08-27-2018, 12:42 PM

Quote:

Originally Posted by Woodsy

While you are pulling it apart to fix the air leak... replace the raw water pump too. Cheap insurance.

Woodsy

Totally agree with this, the air did the impeller no favors...

Dave R · 09-04-2018, 03:52 PM

Any updates?

lfm · 09-04-2018, 07:14 PM

Quote:

Originally Posted by Dave R

Any updates?

Sadly, no. I have neither the trailer or the time, so I took the boat to a marina. Apparently, they don’t have the time either because they haven’t looked at it yet.

Dave R · 09-04-2018, 09:13 PM

Quote:

Originally Posted by lfm

Sadly, no. I have neither the trailer or the time, so I took the boat to a marina. Apparently, they don’t have the time either because they haven’t looked at it yet.

Bummer. Good luck

lfm · 09-10-2018, 09:23 PM

So I got the boat back on Saturday. They flushed every hose in the system and changed the thermostat. No cracked nipple. I ran the boat at planed out at nearly WOT, and the temp never cracked 170.

I don’t understand why it only overtemped on plane before, but am glad it’s fixed.

Thanks again for the advice.

Dave R · 09-11-2018, 03:32 PM

Quote:

Originally Posted by lfm

So I got the boat back on Saturday. They flushed every hose in the system and changed the thermostat. No cracked nipple. I ran the boat at planed out at nearly WOT, and the temp never cracked 170.

I don’t understand why it only overtemped on plane before, but am glad it’s fixed.

Thanks again for the advice.

The thermostat must have been stuck in a barely open position. That's a new problem to me, oh well, glad it's fixed.

08-27-2018, 09:01 AM	#2
Woodsy Senior Member Join Date: May 2004 Location: Weirs Beach Posts: 1,968 Thanks: 80 Thanked 980 Times in 440 Posts	While you are pulling it apart to fix the air leak... replace the raw water pump too. Cheap insurance. Woodsy __________________ The only way to eliminate ignorant behavior is through education. You can't fix stupid.

08-27-2018, 08:46 AM	#1
Dave R Senior Member Join Date: Jul 2004 Posts: 2,985 Thanks: 246 Thanked 744 Times in 444 Posts	I have a Mercruiser Bravo drive (which is a very similar design to the VP you have) and mine was leaking in the same exact place and had the exact same symptoms you described earlier this season. The bravo uses a somewhat different attachment method to connect the hose to the gimbal housing, but a leak there results in the same problem you are having.

The Following User Says Thank You to Woodsy For This Useful Post:
Dave R (08-27-2018)

09-04-2018, 03:52 PM	#4
Dave R Senior Member Join Date: Jul 2004 Posts: 2,985 Thanks: 246 Thanked 744 Times in 444 Posts	Any updates?

09-10-2018, 09:23 PM	#7
lfm Senior Member Join Date: Sep 2003 Location: Alton Bay Posts: 96 Thanks: 29 Thanked 6 Times in 4 Posts	So I got the boat back on Saturday. They flushed every hose in the system and changed the thermostat. No cracked nipple. I ran the boat at planed out at nearly WOT, and the temp never cracked 170. I don’t understand why it only overtemped on plane before, but am glad it’s fixed. Thanks again for the advice.