Idiling the engine in a boat
05-14-2022, 05:40 AM
#21
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05-16-2022, 10:57 AM
#22
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i've done the idiling like you told me...one of the engines is working perfektly i've done like you told me (idel mix screws)...but...the other engine is making me problems...when i try to idel it one of the mix screws is not responding...i can screw it in all the way and the engine is still working.The screw on the side where is the vacum pump for secundety trotle blade is working but the other screw does not respond...what the hell is happening..wally help
05-16-2022, 11:15 AM
#23
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If your idle mixture screws aren't having any affect, you have other issues. I would pull the carb apart and give it a good cleaning. You probably have buildup in the carb blocking the fuel path.
The following 2 users liked this post by ThisIsLivin:
liberator221 (05-16-2022), Wally (05-16-2022)
05-16-2022, 11:30 AM
#24
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05-16-2022, 11:49 AM
#25
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Check and adjust timing first, then follow this quote if mine before taking carb apart again, if easier for you then removing/taking apart.
Grab a aerosol can of carb clean. Make sure you use red straw and blast both ways thru the top air bleeds 4 per side. 2 are idle and 2 are high speed. Some miss this for some reason. Watch your eyes, carb cleaner will squirt back at you. Remove idke mixture screws and spray thru that direction. Carb clean will come out bleed hole on top in carb choke tower right st your eyes. Watch out. Ive squirted my eyes hundreds of times and it hurts bad. Some water in them and just few minutes latet feel fine. I’d take out contacts if you have them.
Best way go set idle mixture screws are in the water, engine fully warned, and in gear. Typically best idle in neutral will need screws opened (counter clockwise) another 1/8-1/4 turn.
Best way go set idle mixture screws are in the water, engine fully warned, and in gear. Typically best idle in neutral will need screws opened (counter clockwise) another 1/8-1/4 turn.
Last edited by SB; 05-16-2022 at 11:55 AM.
05-16-2022, 11:59 AM
#26
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If you have to pull carb, do it this way:
Grab a aerosol can of carb clean. Make sure you use red straw and blast both ways thru the top air bleeds 4 per side. 2 are idle and 2 are high speed. Some miss this for some reason. Watch your eyes, carb cleaner will squirt back at you. Compressed air after doing this is better. As after spraying thru (both ways) all holes in metering blocks and bodies.
Best way go set idle mixture screws are in the water, engine fully warned, and in gear. Typically best idle in neutral will need screws opened (counter clockwise) another 1/8-1/4 turn.
Best way go set idle mixture screws are in the water, engine fully warned, and in gear. Typically best idle in neutral will need screws opened (counter clockwise) another 1/8-1/4 turn.
05-22-2022, 11:38 AM
#28
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Platinum Member
Bear in mind that once you have established optimal (or max) vacuum reading on a healthy engine there's other things that contribute to that reading besides the carb.
You can have a flawless carb setup but if your timing is off , for example , your readings will be lower.
I once had a Ford 351 with a full time vacuum gauge and if I started seeing the idle vacuum fall the first thing I would check would be the wear on the heel of the points mechanism.
Re-set points and back to full vacuum again .
And BTW , I had a friend visit Croatia before the pandemic and the photos blew me away. What an incredibly beautiful and history laden place. .
05-23-2022, 06:10 AM
#29
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Hi guys im back...so this is what happend..i took the carb cleaner and blow the idle mix screws..started the engine no change...then i figured aut that one cilinder is not working...took the spark plug aut and change it...then things started getting better so i wanted to check aut other spark plugs...the head on the right side has long spark plugs and the head on the left side has short spark plugs..does that make a difrence..thanks..allso there was some back fire from the carb but stoped after a wile
Last edited by Zole; 05-23-2022 at 06:18 AM.
05-23-2022, 06:46 AM
#30
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There are some shorter plugs than others. Most important thing is that they working correctly (not fouled or worn) and of the proper type for application. Post both part #’s please.
