Yamaha 150 Pro V Spark plug gap?

baylor43

Cadet
Joined
Jul 15, 2005
Messages
9
New to the forum. I logged on last night and have learned more about outboard motors in the last 12 hours that any manual can teach me. <br /><br />My question is: what is the gap setting for the spark plugs for a 1990 Yammy 150 Pro V. I am having trouble with it. It fires right up, idles, and will go about 5-10 mph, but boggs down when I try to advance the throttle. Spark plugs looked a bit fouled, I have cleaned them and want to check the gaps before I put them back in. Any other ideas? I just purchased the boat and don't know much, so any info would help and be much appreciated. Thanks :confused:
 

edjr

Seaman
Joined
Feb 11, 2005
Messages
51
Re: Yamaha 150 Pro V Spark plug gap?

.040 is the gap on my 86 pro v 150 ..really good motor.welcome to i boats..these guys on here really know there stuff.if it has sat for any period of time remove the carbs and clean real good ( soak them and blow with compressed air )check fuel pumps (diaphram)
 

baylor43

Cadet
Joined
Jul 15, 2005
Messages
9
Re: Yamaha 150 Pro V Spark plug gap?

Thanks for the info. I will check the other items as well as clean the carbs tonight. Is there anywhere on the web to download the manual for this motor?
 

edjr

Seaman
Joined
Feb 11, 2005
Messages
51
Re: Yamaha 150 Pro V Spark plug gap?

not that i know of...i go yamahaoutboardparts.com and they have pictures that are real detailed
 
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