Trojan Boat Forum

Fire order for 318 ?
So took distributor off to match up new one .. I did mark wires but ink didn't hold up well.. anyone have idea of order , if top left plug is 1 and across is 2?

For clockwise rotation engine the firing order is 18436572----- for ccw rotation engine the order is 12756348-----rotation viewed from the front of engine--- someone can jump in but I believe marine engines are viewed from the bell housing end--- anyway that will work so long as you know which way it rotates viewed from the front---Mike

I agree with the firing order. Folks here know that I'm a real stickler when referring to rotation on a marine engine. We need to stick with the marine standard of looking at the rotation from behind the flywheel so that we are all on the same page. Mike, I like that you did qualify the statement by stating the direction you were facing, most don't, hence the confusion at times. This can pose a real problem when discussing or ordering parts from a qualified marine parts supplier who deals in marine terms. The result is incorrect parts, set-up, etc. Standard engine rotation is CCW when looking at the flywheel from behind the engine. Counter engine rotation is CW when looking at the flywheel from behind the engine. Prop rotation is the opposite; Standard prop rotation is CW when standing aft of the prop looking forward, and counter rotation for a prop is CCW. Confusing I know, but I didn't make up the standard!

Big D wrote:I agree with the firing order. Folks here know that I'm a real stickler when referring to rotation on a marine engine. We need to stick with the marine standard of looking at the rotation from behind the flywheel so that we are all on the same page. .... Standard engine rotation is CCW when looking at the flywheel from behind the engine. Counter engine rotation is CW when looking at the flywheel from behind the engine. Prop rotation is the opposite; Standard prop rotation is CW when standing aft of the prop looking forward, and counter rotation for a prop is CCW. Confusing I know, but I didn't make up the standard!

Great description Big D,

This topic comes up fairly often and has me thinking that it might be a good idea to post this quoted portion of your reply along with the firing order for all of the Trojan gas engine options at the top of the forum the "Online Manuals" topic.

What do you think?

[quoteGreat description Big D,

This topic comes up fairly often and has me thinking that it might be a good idea to post this quoted portion of your reply along with the firing order for all of the Trojan gas engine options at the top of the forum the "Online Manuals" topic. ][/quote]

Tried to research certain things for F25 and lot time when you type in key words irrelevant posts pop up. Sometime it is easier just to post fresh topic.

I agree with the firing order. Folks here know that I'm a real stickler when referring to rotation on a marine engine. We need to stick with the marine standard of looking at the rotation from behind the flywheel so that we are all on the same page. Mike, I like that you did qualify the statement by stating the direction you were facing, most don't, hence the confusion at times. This can pose a real problem when discussing or ordering parts from a qualified marine parts supplier who deals in marine terms.

Big D I am new to marine world but do understand it is marine engine . . To me where belt goes would be front or top like in car . I kept the wires in place on engine and marked the ones on distributor , 3 out of 5 ink didn't hold up well ..One way would be magnify pic and trace that way as that pic is correct for that engine

Paul wrote:

Big D wrote:I agree with the firing order. Folks here know that I'm a real stickler when referring to rotation on a marine engine. We need to stick with the marine standard of looking at the rotation from behind the flywheel so that we are all on the same page. .... Standard engine rotation is CCW when looking at the flywheel from behind the engine. Counter engine rotation is CW when looking at the flywheel from behind the engine. Prop rotation is the opposite; Standard prop rotation is CW when standing aft of the prop looking forward, and counter rotation for a prop is CCW. Confusing I know, but I didn't make up the standard!

Great description Big D,

This topic comes up fairly often and has me thinking that it might be a good idea to post this quoted portion of your reply along with the firing order for all of the Trojan gas engine options at the top of the forum the "Online Manuals" topic.

What do you think?

Thanks Paul. I'm good with that...it does come up a lot. The other item that might be considered for easy referrence is the diagram I keep putting up every time starter rotation comes up. It's a pretty visually self explanatory diagram.....no guess work. Remember starters also have a rotation standard....this is confusing

gordd wrote:..... To me where belt goes would be front or top like in car....

It's all good Gordd. A lot of us grew up that way tinkering on cars so we got used to automotive standards and terms, me too, however you want to make sure you're talking the same language when describing your needs to a marine supplier for example or you'll run into issues. Also, if everyone keeps the MARINE standard in mind here, then there won't be any room for error or misunderstanding when advise is given or taken.

Remember starters also have a rotation standard....this is confusing

Lol Big D .. so far that one is working

as a help when stabbing the distributor in you will see a slot in the top of the distributor gear. It should be lined up with the number one cylinder when it is at top dead center on compression stroke and that is true of either rotation.