Re: Restart is hard after the winter
1. Release the glow plug button before you hit the start button. Do NOT hold them both down at the same time.
2. You may have a glow plug solenoid (relay) installed. For your M25 engine, it is an aftermarket addition since they did not come with the engines. I installed one on our boat, it's a cheap Ford solenoid. You might be interested in this and other subjects in our C34 Critical Upgrades: CRITICAL UPGRADES - DO THESE OR ELSE!!!
The glow plug solenoids are here: Faster, More Efficient Glow Plug Heating with a Solenoid - C34
Stu Jackson, C34, 1986, M25 engine, Rocna 10 (22#)