mq10 wont run with cowl

crunchnmunch

Cadet
Joined
May 17, 2013
Messages
13
so iv been working on restoring a 1964 9.5hp mq10 and have gotten it to run pretty good but this hole time iv never had the cowl on. so i finally had it on and it wont start, took it of and she runs, slowly put it on and it dies. any ideas would be awesome
 

Barnacle_Bill

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Feb 8, 2004
Messages
6,469
Re: mq10 wont run with cowl

If the carb is adjusted properly look for an exhaust leak under the cowl.
 

JB

Honorary Moderator Emeritus
Joined
Mar 25, 2001
Messages
45,907
Re: mq10 wont run with cowl

Exhaust leak. Fairly common on MQs
 

TN-25

Chief Petty Officer
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May 27, 2008
Messages
619
Re: mq10 wont run with cowl

Knowing about the exhaust leak issue with the 9? and the problem of torn or cracked bellows in the lower leg I decided to check it out on any motor I considered buying. Before I bought my 1967 MQ-13, I ran it and trolled with it with the cowl on to check for the exhaust leak. It made no difference so I bought it. Later I saw a little hole drilled into the starbord side of the pan, just below and back from the shifter. I thought somebody had pulled a fast one by doing a quick and dirty fix, but after looking around at others, plus some brochure pictures I came to realize that the factory put that hole there. Dad's 1965 MQ-11 did not have the hole.
 

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crunchnmunch

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Joined
May 17, 2013
Messages
13
Re: mq10 wont run with cowl

ya mine doesnt have that hole. would not having the best tune really make it die when the cowl is on. also what part am i looking for a leak is the bellow where the water gets pumped out
 

crunchnmunch

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Joined
May 17, 2013
Messages
13
Re: mq10 wont run with cowl

well found my leak not sure what its called but it was right under the carb when i opend it they looked like reeds. the bottom of the gasket was gone it and was just shooting out gas(maybe exhaust as well).i pulled the old gasket cut a new one and was able to run the motor with the cowl on
photo11_zps3cfa1154.jpg
 

crunchnmunch

Cadet
Joined
May 17, 2013
Messages
13
Re: mq10 wont run with cowl

set up a fan to try and get rid of some of the exhaust the motor runs pretty good now with a fan and the cowl on. noticed today that there are two holes on the sides of my cowl but they have a tar over the hole on the inside. wondering if any one else has the same holes b4 i remove the tar
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photo12_zps5849509a.jpg

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also made some new gaskets for the carb and a new stopper(was cracked)
photo17_zps71f94cb3.jpg

photo16_zps520299a1.jpg
 
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