1991 Force 120 Cooling Problems

admiralharpoon11

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Sep 6, 2008
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Hi Frank,Roscoe,et al, got my boat back from a mechanic who replaced the trigger and coil(I would have tried to troubleshoot but dont have a DVA adapter yet) anyway, he said to check waterpump so i pulled L/U and impeller was totally gone except hub.i had pieces of the vanes all over in the pump housing.replace impeller,cleaned the housing,put back together.started it(in large barrel) and had good stream from the 2 holes on leg.well- the overheat alarm went off after about 5min of idiling(yes i immediately shut down motor and head did fell pretty hot). ok, i pulled t-stat and it tested fine(143@)I flushed water down t-stat opening and it did come out of water tube,i also force water up water tube and it came out t-stat opening.checked impeller(it looked great) and bolted up L/U.restarted motor and water flowed good from the 2 holes in leg-DAM_,there goes the overheat alarm:confused: I assume ive got a piece of old impeller stuck in the cooling passages of the powerhead.should i pull both the head and exhaust plates off? can i reuse any of the gaskets for either?also do i use any sealants for the exhaust plates side?I have a seloc book(not so good on somethings).I appreciate any incite/recommendations you guys may have. I was able to get ahold of a head gasket and a exhaust gasket. Do i have to use any of the real expensive dial torque wrenches or can i use one of the less expensive torque wrenches? And also do I use any kind of sealant on the exhaust side? Any hints, tips or suggestions are greatly apprecitated. thanks so much gary P.S. Exactly how many bolts are there on the exhaust plate side?
 
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