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Volvo MD17D Cold Start fitting-what does it do?

Kurrawong_Kid

Well-known member
Joined
7 Sep 2001
Messages
1,616
As I have replaced the injection pump, following a saga involving the removal of the engine (as mentioned in earlier posts) I have noticed that the "cold start"pin is drooping because the seal in the cold start fitting is damaged. I have put a couple of cable ties around the pin to help make contact with the operating arm and allow the correct adjustment to be made. However a cable, which also stops the engine, attaches to a seperate fitting which also has a pin on it and activates the operating arm. Does anyone know if the" cold start"fitting actually does anything or is it just redundant from earlier models without remote controls? I attach a sketch which may make it a little clearer. Further clarification may be found on the marine parsts europe exploded views.img174 (2).jpg
 

Jcorstorphine

Well-known member
Joined
19 Aug 2001
Messages
1,860
Location
Scotland
Hi, I can only make a comment on my old MD2B which was two cylinder version of your engine. My engine had a cold start and if I did not deploy it, there was little chance of the engine starting even in the middle of summer (engine was quite worn) The device on my engine was a brass button which one pressed and it would stay depressed until the engine started when it would be released. My understanding was that it opened the fuel rack 100% to inject extra fuel to assist the engine to start. I have looked on the Marine Parts Europe and the unit shown there is totally different. The only schematic i can find is this one which shows a solenoid operated device in lieu of the brass button but I am sure its serves the same function.

Volvo Penta Exploded view / schematic Cold Start Control - MarinePartsEurope.com

2020-11-22.png
 

VicS

Well-known member
Joined
13 Jul 2002
Messages
45,472
Location
Home: Kent. Boat: Chichester
Hi, I can only make a comment on my old MD2B which was two cylinder version of your engine. My engine had a cold start and if I did not deploy it, there was little chance of the engine starting even in the middle of summer (engine was quite worn) The device on my engine was a brass button which one pressed and it would stay depressed until the engine started when it would be released. My understanding was that it opened the fuel rack 100% to inject extra fuel to assist the engine to start. I have looked on the Marine Parts Europe and the unit shown there is totally different. The only schematic i can find is this one which shows a solenoid operated device in lieu of the brass button but I am sure its serves the same function.

Volvo Penta Exploded view / schematic Cold Start Control - MarinePartsEurope.com
The diagram at Marine Parts is of the remote remote operation accessory for the brass button , and a solenoid alternative.

According to the owners manual the MD17 engines had an automatic cold start device ... I've no idea how that worked.
 
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