temperature sender problem ?

[leander borg]

The temp guage is moving very little when engine runs for about 15 mins.
I tried to figure out this guage problem. The guage is fine because if I short the SEND connector (on guage) to ground, the needle goes all up to the right. Therefore the sender may be the problem. When cold the sender gives a reading of 850ohms on the ohmmeter.
I have the standard mercury guage. Can I only buy a new sender to fit this type of guage, or does they come as a sender+guage kit ?
Thank you for any help

 

[pnwboat]

Re: temperature sender problem ?

What year and HP motor do you have?

Generally, the water in two stroke outboards run much cooler than four stoke automotive type inboard/outboard engines with closed cooling systems. Remember, you're pulling in a constant supply of cold water from the body of water you're in. After it passes through the motor, it gets dumped back into the lake. The thermostats in the two stroke Force engines are usually in the 130 - 145 degree range. Most temperature gauges don't read that range very well and you won't see much movement in the needle.

 

[leander borg]

Re: temperature sender problem ?

1992 (I think) Force 70hp.
When left running for 15mins, the needle moves very little, and nearly reaches the 130 deg F