3200 SCR Speedometer? - Maxum Boat Owners Club

0Gravity · 04-20-2016, 05:57 AM

Hi All,
About the middle of last summer my Speedometer quit working! I'm assuming it's either a clog in the pitot or the gauge itself went bad. ...I was changing my gear oil today and was looking for the Speedometer pitot and can't seem to locate it. ...Can anyone ley me know where to look or give me any other idea where to look for my problem?
Thanks in advance,
Mike

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gmc60 · 04-20-2016, 11:41 AM

bravo its on the out drive in front 1/4 way up drive hooked to a yellow insert . I had that problem went to a plug and play gps , all contained just had to run a power wire . Works great down to 1 mph .

mmwjr · 04-20-2016, 12:36 PM

The pitot is built into the leading edge of the outdrive about inline with the water intake. The tube then connects to the top of the lower unit just below where the exhaust bellows attaches.

0Gravity · 04-20-2016, 01:12 PM

Cool I'll check it out. .. thx guys!

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speedysprocket · 04-20-2016, 02:05 PM

To build on this, both drives come hooked up with pitot tubes to the transom, but only the starboard side actually goes to the gage, correct? I took the hose off the port side because it was in such bad shape and plugged the transom hole with silicone.
The passages in both my drives were packed pretty solid with silt and such.
My boat also has a speed pickup wheel on the bottom of the hull, just forward of the port engine's fuel and water pumps. It's a big assembly and the wheel itself appears to be mounted on a removable plug so you can take it out from inside the boat to service it. Wheel is stuck and so is the plug. Was this a Maxum installed thing for something, or probably an aftermarket fish finder or...?

shrew · 04-20-2016, 03:28 PM

I would ignore the speedo. They are notoriously inaccurate. Do you really want a hose with water going straight to the underside of your dash where your fuse blocks are located?

GPS is way more accurate.

mmwjr · 04-20-2016, 05:06 PM

Quote:

Originally Posted by speedysprocket

To build on this, both drives come hooked up with pitot tubes to the transom, but only the starboard side actually goes to the gage, correct? I took the hose off the port side because it was in such bad shape and plugged the transom hole with silicone.
The passages in both my drives were packed pretty solid with silt and such.
My boat also has a speed pickup wheel on the bottom of the hull, just forward of the port engine's fuel and water pumps. It's a big assembly and the wheel itself appears to be mounted on a removable plug so you can take it out from inside the boat to service it. Wheel is stuck and so is the plug. Was this a Maxum installed thing for something, or probably an aftermarket fish finder or...?

That paddle wheel is for an aftermarket GPS combo unit. I have one as well and it also has a built in water temp sensor.

mmwjr · 04-20-2016, 05:08 PM

Quote:

Originally Posted by shrew

I would ignore the speedo. They are notoriously inaccurate. Do you really want a hose with water going straight to the underside of your dash where your fuse blocks are located?

GPS is way more accurate.

Water should never get to the helm as the air in the tube will block it. Now if the tube were to break in the helm area then yes water may leak here.

speedysprocket · 04-20-2016, 06:41 PM

Quote:

Originally Posted by mmwjr

That paddle wheel is for an aftermarket GPS combo unit. I have one as well and it also has a built in water temp sensor.

Thanks!
Any tips for freeing it up...?

mmwjr · 04-20-2016, 10:49 PM

Quote:

Originally Posted by speedysprocket

Thanks!
Any tips for freeing it up...?

Does it look damaged? Remove any marine growth and hit with PB blaster

speedysprocket · 04-20-2016, 10:54 PM

Quote:

Originally Posted by mmwjr

Does it look damaged? Remove any marine growth and hit with PB blaster

Doesn't look damaged and there's no apparent growth, but it did sit in the water for three years without moving. Is there a technique to removing the speedo plug? I think it looked like it should just pull out after removing the retaining ring, but I felt like the plastic was going to break before it budged...

mmwjr · 04-20-2016, 10:58 PM

What is it plugged into? Ones I have pull out once the locking collar is undone

speedysprocket · 04-20-2016, 11:00 PM

I didn't see an electrical plug. When I say plug, I was referring to the removable piece the speedo wheel is mounted to.

mmwjr · 04-20-2016, 11:02 PM

Mine is screwed into the transom.

shrew · 04-21-2016, 02:49 PM

Quote:

Originally Posted by mmwjr

Water should never get to the helm as the air in the tube will block it. Now if the tube were to break in the helm area then yes water may leak here.

That is EXACTLY the scenario I'm concerned about. I've seen and heard of it happening more than a few times.

speedysprocket · 04-21-2016, 09:11 PM

That's the speedo plug I'm having trouble removing...

mmwjr · 04-21-2016, 11:06 PM

Oh it's a tru hull, not seen these typically. Mine is mounted on the entire of the transom.

Is you plan to remove it and fill the hole?

speedysprocket · 04-21-2016, 11:38 PM

I don't know what it's for. I just wanted it to spin and be able to remove it easily.

mmwjr · 04-22-2016, 02:14 AM

Quote:

Originally Posted by speedysprocket

I don't know what it's for. I just wanted it to spin and be able to remove it easily.

May I ask why, disturbing it may cause it to leak. So unless you plan to remove it completely and fill the hole I would let it be.

speedysprocket · 04-22-2016, 02:36 AM

Quote:

Originally Posted by mmwjr

May I ask why, disturbing it may cause it to leak. So unless you plan to remove it completely and fill the hole I would let it be.

Because the wheel is stuck. Also thought this is a better time to replace whatever o-ring it may have.